Gonna need to get that 22 sale confirmed since not all histories match, and more was exchanged. Im quite sure it was less than 22 tho; I only count 21 keys moving from his bp, 4 of which were used to upgrade that FJ:

http://backpack.tf/profiles/76561198050745352?time=1455782400

That would make that sale 17 (but then again Im not 100% sure; most of the other key histories seemed to match tho.)

Theres a couple of other sales of which I cant make anything

Complex

http://backpack.tf/profiles/76561198183862922/#!/compare/1457337600/1457769600

Seems to have been qsed for 11

http://backpack.tf/profiles/76561198118496274/#!/compare/1457596800/1457683200

Sold and resold too fast to see here, altho the sale here is probably the purchase above

http://backpack.tf/profiles/76561197972352933/#!/compare/1457424000/1457596800

it also seems to have sold 1:1 with this:

http://backpack.tf/item/1767668175

histories are kinda weird on it but they match

http://backpack.tf/profiles/76561198068165462/#!/compare/1456560000/1456646400

Thats outdated tho and can be repriced with this I guess