Old and overpriced.

Sale 1:

http://backpack.tf/profiles/76561198096210931#!/compare/1474156800/1474934400

Sold + 9 keys for a Strange Searing Plasma Rotation Sensation

Sensation Mini:

http://backpack.tf/profiles/76561198096210931#!/compare/1475539200/1475625600

Sold for Flies Stash + Phosphorus Lucky Shot + Hot Blue Mew SMG

Stash mini: http://backpack.tf/suggestion/57ff0e458667470505019715

33 keys, looks pretty reasonable

x = 33 + 42 + 13

x = 88

Back to Chullo:

x + 9 = 88

x = 79

Rounding to 80, seems like only sale.

http://backpack.tf/item/4848738730 hasn't sold in 4 ish months, he's selling at http://www.tf2outpost.com/trade/28490838 for 80 keys which supports

http://backpack.tf/item/4815746350 other Chullo I can track. Sales in recent 3 months are basically between scammers and through gambling bots, so it doesn't really look like there's anything usable there. http://www.tf2outpost.com/trade/28521680 current owner is selling at 80 , also supports

80 flat looks fine. Feel free to correct me if I did anything wrong in the comments!