Yes, I'm back and this time I don't have terrible evidence like last time :P

Take note that there are barely anyone selling these. The other trades I found the profiles seemed like they were scammed off or the trades deemed to hard to find the evidence.

http://backpack.tf/stats/Strange/Sole%20Mate/Tradable/Craftable

http://www.tf2outpost.com/search/242430457

Sellers:

http://www.tf2outpost.com/trade/25277126 (2 keys)

http://www.tf2outpost.com/trade/25345846 (3 Keys)

Solds:

http://backpack.tf/profiles/76561198060022442?time=1425196800 (Sold for a specialized killstreak Gold Botkiller Medi Gun MK.I(Currently being sold at around 5 keys on the market) but the seller had to add in a Strange Festive Force a Nature (2 keys))

http://www.tf2outpost.com/trade/24917454 (Sold for 2 keys)?

I honestly can't find anymore proof, if you guys can then please do give the links below :)