Monty Python

https://backpack.tf/item/2733427828

Sale 1) Sold for 34 Keys

https://backpack.tf/profiles/76561198047573393#!/compare/1527379200/1527465600

Sale 2) ?

https://backpack.tf/profiles/76561198002757046#!/compare/1527984000/1528070400

https://backpack.tf/profiles/76561198046160451#!/compare/1527984000/1528070400

https://backpack.tf/item/3577222856

Sale 3) ?

https://backpack.tf/profiles/76561198017353089#!/compare/1527897600/1527984000

https://backpack.tf/profiles/76561198273241552#!/compare/1527897600/1528070400

https://backpack.tf/item/4208028558

Sale 4) Sold for 29 Keys

https://backpack.tf/profiles/76561198121043716#!/compare/1527811200/1527897600

Sale 5) ?

https://backpack.tf/profiles/76561197998290686#!/compare/1527638400/1527897600

https://backpack.tf/profiles/76561198039795894#!/compare/1527552000/1527897600

https://backpack.tf/item/5135905651

Sale 6) Sold for 20 Keys + ~3 Keys of Items

https://backpack.tf/profiles/76561198195731583#!/compare/1528070400/1528243200

https://backpack.tf/profiles/76561198305686821#!/compare/1528070400/1528243200

20 + 3 = 23 Keys

https://backpack.tf/item/5187282784

Sale 7) Sold for a Hellish Inferno Russian Arms Race

https://backpack.tf/profiles/76561198195597491#!/compare/1526342400/1526515200

Not using this as the Arms is unpriced.

Sale 8) Sold for 21 Keys + ~1 Key of Refined

https://backpack.tf/profiles/76561197963394917#!/compare/1526342400/1526428800

21 + 1 = 22 Keys

Sale 9) Bulk sale for a Sunbeams Head Hedge

https://backpack.tf/profiles/76561198078667964#!/compare/1528329600/1528416000

Sale 10) Sold for a Duped Vivid Plasma Lord Cockswain's Pith Helmet (20 Keys)

https://backpack.tf/profiles/76561198074184778#!/compare/1528329600/1528416000

Pith Mini

https://backpack.tf/item/593360197 - The history for the following 2 sales

https://backpack.tf/profiles/76561198115102647#!/compare/1524528000/1524700800 - Bought for an Aussie Sniper (23.5 Keys)

https://backpack.tf/profiles/76561198115102647#!/compare/1524528000/1524700800 - Sold + 1 Key for a Circling Peace Sign Tyrant's Helm

http://www.tf2outpost.com/trade/29632270 - The Peace Sign Tyrant's sale is capped by the Buyout of 24 Keys

https://backpack.tf/profiles/76561198074184778#!/compare/1528502400/1528588800 - Sold for a Vivid Plasma Flipped Trilby (25 Keys)

https://backpack.tf/profiles/76561198293713566#!/compare/1528502400/1528588800 - Buyer's Backpack for the Trilby sale

https://backpack.tf/profiles/76561198099564208#!/compare/1528416000/1528588800 - The Trilby was traded for the Lantern Shako (20 Keys) + 5 Keys

https://backpack.tf/profiles/76561198293713566#!/compare/1528502400/1528588800 - Sold for a Terror-Watt Towering Pillar of Hats

https://backpack.tf/profiles/76561198395846608#!/compare/1528675200/1528761600 - Sold + 5 Keys for a Circling TF Logo Tyrant's Helm

http://www.tf2outpost.com/trade/29680994 - The Logo Tyrant's sale had a Buyout of 24 Keys

https://backpack.tf/profiles/76561198395846608#!/compare/1528934400/1529107200 - Sold for 16 Keys

https://backpack.tf/profiles/76561198121278391#!/compare/1530057600/1530144000 - Sold for 20 Keys

https://backpack.tf/profiles/76561198057368586#!/compare/1530057600/1530144000 - The other 24 Keys in the above sale were used to buy the Glove

Taking 16 - 24 Keys

Sale 11) Sold for 18 Keys

https://backpack.tf/profiles/76561198799757343#!/compare/1528675200/1528848000

Sale 12) Sold for a Cloud 9 Slick Cut (20 Keys)

https://backpack.tf/profiles/76561198192318630#!/compare/1528675200/1528848000

Slick Cut Mini

https://backpack.tf/profiles/76561198012358594#!/compare/1525132800/1525305600 - Sold for 18 Keys

https://backpack.tf/profiles/76561198137530703#!/compare/1526601600/1526688000 - Sold for 23 Keys

https://backpack.tf/profiles/76561198004357618#!/compare/1526515200/1526860800 - Sold for a Circling Peace Sign Buccaneer's Bicorne (no Mini)

https://backpack.tf/profiles/76561198271904484#!/compare/1527724800/1527811200 - Sold + 2 Keys + ~1 Key of Items for a Smoking Brown Bomber

https://backpack.tf/profiles/76561198155476440#!/compare/1528156800/1528243200 - Sold for a Smoking Dr's Dapper Topper + ~1 Key of Items

https://backpack.tf/profiles/76561198805783306#!/compare/1527984000/1528243200 - Sold for a Starstorm Insomnia Engineer's Cap

https://backpack.tf/profiles/76561198062329277#!/compare/1528329600/1528416000 - Sold for 18 Keys

https://backpack.tf/item/5179039828 - History for the above sale

https://backpack.tf/profiles/76561198188754881#!/compare/1528416000/1528502400 - Sold for a Green Energy Sky High Fly Guy (should be used there)

https://backpack.tf/profiles/76561198197084865#!/compare/1528502400/1528588800 - Sold for 12 Keys + ~5 Keys of Items

https://backpack.tf/profiles/76561198192318630#!/compare/1529020800/1529107200 - Sold + 1 Key + ~1 Key of Items for a Smoking Caribou Companion

Taking 17 - 23 Keys

Brown Bomber Micro

https://backpack.tf/profiles/76561198105353608#!/compare/1526601600/1526688000 - Sold for a Searing Plasma Bonk Helm + 2 Keys

https://backpack.tf/profiles/76561198803829026#!/compare/1527120000/1527206400 - Sold for a Black Max's Severed Head (~19 Keys) + 1 Key

https://backpack.tf/profiles/76561198271904484#!/compare/1527897600/1527984000 - Sold for a Bubbling Executioner + 1 Key

http://www.tf2outpost.com/trade/29671131 - The above sale had a Buyout of 24 Keys

https://backpack.tf/profiles/76561198066009371#!/compare/1527724800/1527984000 - Quicksold for 19 Keys

https://backpack.tf/profiles/76561198043800994#!/compare/1528156800/1529020800 - Sold + ~1.5 Keys of Mixed for a Vivid Trilby + ~0.5 Keys of Items

https://imgur.com/a/oThz0YM - The Trilby has a 1 Month Seller at 24 Keys

https://backpack.tf/profiles/76561198830746853#!/compare/1528588800/1528675200 - Sold for 22 Keys

https://backpack.tf/profiles/76561198392596554#!/compare/1530144000/1530316800 - Sold for 20 Keys

https://backpack.tf/profiles/76561198003404879#!/compare/1523577600/1523664000 - Sold for 19 Keys

https://backpack.tf/profiles/76561198003404879#!/compare/1525132800/1525219200 - Sold for a Dead Presidents Ye Olde Baker Boy + 7 Keys

http://www.tf2outpost.com/trade/29620511 - Capped by the Buyout of 21 Keys

https://backpack.tf/profiles/76561198132808002#!/compare/1525564800/1525651200 - Sold for ~11 Keys of Items + 8 Keys

Should be around 19 - 22 Keys, no higher than 19 - 25 with the Trilby sale.

Dapper Micro

https://imgur.com/a/ikOrXZZ - 3 Day Seller at 20 Keys

Engineer's Cap Micro

https://backpack.tf/profiles/76561198095433550#!/compare/1526774400/1526860800 - Sold for 17 Keys

https://backpack.tf/profiles/76561198155558267#!/compare/1526774400/1526860800 - Quicksold for 17 Keys + 1 Refined

https://backpack.tf/profiles/76561198805783306#!/compare/1528416000/1528502400 - Sold for an Orbiting Fire Modest Metal Pile of Scrap

https://imgur.com/a/f3wo8TR - The Modest has a 2 Day Seller at 19 Keys, a 6 Day Seller at 20 Keys, and a young Seller at 20 Keys

https://backpack.tf/profiles/76561198388363768#!/compare/1528502400/1528588800 - Sold for 19 Keys + <0.5 Keys of Items

This should be around 19 - 20 Keys

Caribou Micro

https://backpack.tf/profiles/76561198192318630#!/compare/1529107200/1529193600 - Sold for a Purple Energy Janissary Ketche

http://www.tf2outpost.com/trade/29696574 - The Ketche has a 6 Day old unbumped Seller at 25 Keys

https://backpack.tf/profiles/76561198121913969#!/compare/1523836800/1523923200 - Sold for a Hot MW Dovetailed Rocket Launcher

http://www.tf2outpost.com/trade/29621529 - The above sale is capped by the Buyout of 25 Keys

This should be around 22 - 25 Keys, but no higher than 25 Keys.

Sale 13) Sold for a Specialized Killstreak Australium Medi Gun (~27 Keys)

https://backpack.tf/profiles/76561198197084865#!/compare/1528848000/1528934400

https://backpack.tf/item/5572459769

Sale 14) Sold for 17 Keys

https://backpack.tf/profiles/76561198363395191#!/compare/1528156800/1528243200

https://backpack.tf/profiles/76561198383424204#!/compare/1528156800/1528243200

https://backpack.tf/item/6699284383

Sale 15) Sold for a Dead Presidents Prince Tavish's Crown (16.5 Keys)

https://backpack.tf/profiles/76561198828941288#!/compare/1527811200/1527897600

https://backpack.tf/profiles/76561198144945119#!/compare/1527811200/1527897600

Rounds to 17 Keys

Crown Mini

https://backpack.tf/suggestion/5b392584cf6c7507e37b1f5c - 16.5 Keys

https://backpack.tf/item/6912589519

Sale 16) Sold + Cloud 9 Helmet Without a Home (13 Keys) for a Purple Energy Hotrod (30.5 Keys)

https://backpack.tf/profiles/76561198353077078#!/compare/1529020800/1529193600

30.5 - 13 = 17.5, which rounds to 18 Keys

Sale 17) Sold for 19 Keys

https://backpack.tf/profiles/76561198447627633#!/compare/1529539200/1529625600

https://marketplace.tf/items/1115;5;u3003 - Sale at $39.95 when Keys were ~$1.94 each

39.95 / 1.94 = 20.59, which rounds to 21 Keys

https://imgur.com/a/1FUIPuq - Sellers at: 20 (<1 Hour), 20.14 (15 Hours), 26 (7 Days), 30 (3 Days), 33 (18 Hours)

Sales at: 17, 17 Pure, 18, 18 Pure, 19 Pure, 20, 21, 21 Cash, 22 Pure, 23 basically Pure, 27 basically Pure, 29 Pure, 34 Pure

Calling 27, 29, and 34 high.