THIS. IS. a price suggestion.

https://backpack.tf/item/234603386

Sale 1) Sold for 47 Keys

https://backpack.tf/profiles/76561198061376237#!/compare/1519862400/1519948800

Sale 2) Sold for 40 Keys + ~5 Keys of Items

https://backpack.tf/profiles/76561198292242424#!/compare/1521849600/1521936000

40 + 5 = 45 Keys

https://backpack.tf/item/276179334

Sale 3) Sold + Terror-Watt Texas Tin Gallon (13.5 Keys) for a Duped Purple Energy Defiant Spartan (53 Keys) + 1 Key

https://backpack.tf/profiles/76561198438949212#!/compare/1520553600/1520640000

https://backpack.tf/profiles/76561198208062409#!/compare/1520553600/1520640000

53 + 1 - 13.5 = 40.5, which rounds to 41 Keys

Spartan Mini

Sold for a Burning Flames Base Metal Billycock (31 Keys) + 22 Keys

https://backpack.tf/profiles/76561198088031934#!/compare/1525305600/1525392000

Billycock Macro

https://backpack.tf/suggestion/5b106620cf6c7515b50da14d - 31 Keys

Sale 4) Bulk sale for a Circling Heart Pyromancer's Mask

https://backpack.tf/profiles/76561198141759436#!/compare/1524700800/1524787200

Sale 5) Sold for a Green Energy Jumper's Jeepcap (36.5 Keys) + 9 Keys

https://backpack.tf/profiles/76561198114402400#!/compare/1525737600/1525824000

36.5 + 9 = 45.5, which rounds to 46 Keys

Sale 6) Sold for a Duped Burning Flames Respectless Rubber Glove + 2 Keys

https://backpack.tf/profiles/76561198137799038#!/compare/1525824000/1526083200

http://www.tf2outpost.com/trade/29646639 - Capped by the Buyout of 48 Keys

Glove Mini

Sold + Fountain of Delight Headcase (7 Keys) for a Chiroptera Venenata Strontium Stove Pipe (43 Keys) + Circling Heart Glengarry Bonnet (18 Keys)

https://backpack.tf/profiles/76561198192602363#!/compare/1525305600/1525392000

Sold + 2 Keys + ~1 Key of Items for a Bubbling Crone's Dome

https://backpack.tf/profiles/76561198137799038#!/compare/1526083200/1526169600

Sale 7) Sold for a Starstorm Slumber Hat With No Name + 6 Keys + ~4 Keys of Items

https://backpack.tf/profiles/76561198122604075#!/compare/1527206400/1527292800

http://www.tf2outpost.com/trade/29664848 - Capped by the Buyout of 48 Keys

HWNN Macro

https://backpack.tf/item/5227950077

Sale 1) Sold for $71.49 when Keys were ~$1.98 each

https://marketplace.tf/items/631;5;u110

71.49 / 1.98 = 36.1, which rounds to 36 Keys

https://backpack.tf/item/5217677732

Sale 2) Sold for $92 when Keys were ~$1.95 each

https://marketplace.tf/items/631;5;u110

92 / 1.95 = 47.2, which rounds to 47 Keys

https://backpack.tf/item/5193031840

Sale 3) Sold for 50 Keys

https://backpack.tf/profiles/76561197964171516#!/compare/1524182400/1524268800

Sale 4) Sold for a Starstorm Slumber Kiss King (29 Keys) + Corona Australis (12.75 Keys)

https://backpack.tf/profiles/76561197991111981#!/compare/1527206400/1527292800

29 + 12.75 = 41.75, which rounds to 42 Keys

Kiss Mini

https://backpack.tf/suggestion/5b10d30a44325a66ef2ac3ad - 29 Keys

Sale 8) Sold for a Tesla Coil Screamin' Eagle (40 Keys) + 6 Keys + ~1 Key of Items

https://backpack.tf/profiles/76561198049256128#!/compare/1527379200/1527465600

40 + 6 + 1 = 47 Keys

Sale 9) Bulk sale for a Spellbound Hottie's Hoodie

https://backpack.tf/profiles/76561198346875595#!/compare/1527552000/1527638400

https://imgur.com/a/BOiIorN - 2 Sellers at 40 Keys, 1 Seller at 44 Keys, 1 Seller at 45 Keys, 1 Seller at 47 Keys

https://backpack.tf/item/276179334

https://backpack.tf/item/265208345

https://backpack.tf/item/298852630

https://backpack.tf/item/3046359995

https://backpack.tf/item/1157064648