Choo Choo. Car 33.

Resuggestion, thanks to Mindacos & Adolf Storms for the info!

Sale 1:

https://backpack.tf/profiles/76561198145433023#!/compare/1529452800/1533254400

https://backpack.tf/profiles/76561198090938903#!/compare/1533168000/1533254400

Sold with negligible sweets for Bubbling Cotton Head(22)

Sale 2:

https://backpack.tf/profiles/76561198090938903#!/compare/1533254400/1534204800

https://backpack.tf/profiles/76561198305676157#!/compare/1534118400/1534204800

QS

Sale 3:

https://backpack.tf/profiles/76561198305676157#!/compare/1534377600/1534464000

https://backpack.tf/profiles/76561198076658566#!/compare/1534032000/1534464000

Sold with a key in sweets for Blizzardy Danger

use there.

Sale 4:

https://backpack.tf/profiles/76561198091133177#!/compare/1533081600/1533513600

https://backpack.tf/profiles/76561198074192315#!/compare/1533168000/1533427200

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198074192315#!/compare/1535760000/1536278400

https://backpack.tf/profiles/76561198210809861#!/compare/1536105600/1536278400

Sold for Aussie Ambassador(13) + ~11 keys in sweets

Total is 25 keys

Sale 6:

https://backpack.tf/profiles/76561198061275415#!/compare/1531872000/1531958400

https://backpack.tf/profiles/76561198056523528#!/compare/1531699200/1531958400

Sold for 29 keys

Sale 7:

https://backpack.tf/profiles/76561198364904565#!/compare/1534723200/1534809600

https://backpack.tf/profiles/76561198071748630#!/compare/1534636800/1534723200

Sold for Tesla Toadstool

Toadstool Mini:

https://backpack.tf/suggestion/5b9a21ce44325a769b19158b

Suggestion for 33 keys

Sale 8:

https://backpack.tf/profiles/76561198071748630#!/compare/1534896000/1534982400

https://backpack.tf/profiles/76561198024867201#!/compare/1534896000/1534982400

Sold with 15 keys for Neutron Coldsnap Cap

use there.

Sale 9:

https://backpack.tf/profiles/76561198024867201#!/compare/1535587200/1535673600

https://backpack.tf/profiles/76561198020881110#!/compare/1535500800/1535673600

Untrace.

Sale 10:

https://backpack.tf/profiles/76561198195731583#!/compare/1536019200/1536105600

https://backpack.tf/profiles/76561198091064029#!/compare/1525651200/1536451200

Sold for 30 keys

Sale 11:

https://backpack.tf/profiles/76561198095022965#!/compare/1532908800/1533081600

https://backpack.tf/profiles/76561198128712490#!/compare/1532995200/1533254400

Sold for 30 keys

Sale 12:

https://marketplace.tf/items/30976;5;u58

Sold for 60 USD

Keys at 1.88 USD

Total is 31.91 keys

Sale 13:

https://backpack.tf/profiles/76561198020881110#!/compare/1536969600/1537056000

https://backpack.tf/profiles/76561198207933564

Sold for 28 keys + ~1 key in sweets

Total is 29 keys (B/O of 30 keys)

Total sales @:

22, 25, 28, 29, 30, 30, 31.91, 33 keys

https://i.imgur.com/vV3E5tS.jpg

Seller at 30 keys,

Buyers up to 17 keys

Mindacos' Part:

I have to agree with Adolf here. If we also took the two sales you didn't use into account(Neutron Coldsnap, Blizzardy Danger), you'd have one sale at ~28 Keys, and a sale way over 30 Keys. There isn't enough justification to include 22 here.

25-30 should be fine for this.