Hey look I have a blue belt

I wonder who I have to thank for that

(Spoiler alert: It's Mindacos)

Sold for 15 Keys

http://backpack.tf/profiles/76561198336407054#!/compare/1487116800/1487203200

Sold with ~5 Keys in Sweets for an Australium Pro KS Stickybomb Launcher(~19 Keys)(14 Keys total)

http://backpack.tf/profiles/76561198175249965#!/compare/1491350400/1491436800

Sold for a Kill-a-Watt Airdog(14 Keys)

http://backpack.tf/profiles/76561198134813395#!/compare/1492992000/1493078400

Sold for 13 Keys

http://backpack.tf/profiles/76561198098523167#!/compare/1490140800/1490400000

Sold for 16 Keys

http://backpack.tf/profiles/76561198344933095#!/compare/1490400000/1490486400

Sold for 15 Keys

http://backpack.tf/profiles/76561198090952225#!/compare/1487894400/1488153600

Sold for ~13 Keys in Items

http://backpack.tf/profiles/76561198273579483#!/compare/1491868800/1492041600

Sold for 16 Keys(1 Key was in metal)

http://backpack.tf/profiles/76561198048008254#!/compare/1491264000/1491350400

Sold for 14 Keys(1 Key was in metal)

http://backpack.tf/profiles/76561198096442287#!/compare/1491696000/1492041600

Sold for 13 Keys

http://backpack.tf/profiles/76561198159709691#!/compare/1488067200/1488153600

Sold for 13 Keys

http://backpack.tf/profiles/76561198030857201#!/compare/1492214400/1492300800

13-16.

Credits to Mindacos for finding the proof. All I did was make the actual suggestion.