Sold mine so this may need a small update.

Still using sales from old suggestion.

New sale

http://www.tf2outpost.com/trade/23036889 - Sold for a Gifted Green Confetti Scotsman's Stove Pipe (15 keys) + 5 keys in sweets (20*0.9 = 18 keys = 1.1 buds)

Mini for the Gifted Green Confetti Scotsman's Stove Pipe

http://www.tf2outpost.com/trade/23209801 - Sold for an Aces High Reggaelator, I added 5 keys in sweets (1.5*0.9 - 0.3 = 1 buds) but had BO of 15 keys.

Sellers

http://www.tf2outpost.com/trade/23290396 - 20 keys

http://www.tf2outpost.com/trade/23020024 - 24 keys

http://www.tf2outpost.com/trade/23263131 - 1.4 buds

Feel free to counter / support my proofs.