Posting this on sin's behalf, as he did not have enough backpack value. Easily 95% of this suggestion was done by him, and ~5% (if even that) was contributed by me.

Sale #1

Sold for Nether Trail Prehistoric Pullover along with 4k and 2k in skins

http://backpack.tf/profiles/76561198198896481#!/compare/1479772800/1479859200

http://backpack.tf/profiles/76561198036445124?time=1479859200

Taking 175k

Sale #2

Sold for Haunted Ghosts Rotation Sensation and a Strange Pro KS AWP

http://backpack.tf/profiles/76561198135763017#!/compare/1476316800/1476403200

Taking 162k

Sale #3

Sold for Atomic Captain Space Mann

http://backpack.tf/profiles/76561198105525229#!/compare/1476057600/1476144000

Taking 185k

Final Price: 162k-185k

But wait, there's more!

Seller @ 155 keys: http://www.tf2outpost.com/trade/28623607 -young, but something tells me it won't sell anytime soon

Taking 155-185.