https://backpack.tf/profiles/76561198188251237#!/compare/1501372800/1501545600- Nuts Belt, 13

http://www.tf2outpost.com/trade/29278015 - B/O was 12, capped there

https://backpack.tf/profiles/76561198111708439#!/compare/1499644800/1499904000 - Stormy Buckaroos, mini at 12

Buckaroos mini: https://backpack.tf/profiles/76561198116182688#!/compare/1498694400/1498780800 - Spec KS Aussie FaN + ~2 keys of sweets, ~12

Current sellers: http://imgur.com/a/vj1pU

Your sale is from TF2Mart, which we don't use as primary proof because their point conversion system and bot network make sales impossible to fully confirm. And moreover, it's countered by sellers. Go with 12 flat here.