Well Interesting one.

Seller for $250 on marketplace.tf, For 125 keys (keys are $2 on mp.tf right now). https://backpack.tf/item/6224896754

Sale 1: Sold for 87 keys pure. https://backpack.tf/profiles/76561198092599505#!/compare/1510012800/1510185600

Sale 2: Sold for Frostbite Sola Mate(~60)+DaD Pomade Price(~80)+Fod Rancho Relaxo(mini for 60 keys)+Potassium Bonnet(~11.5keys) and 2 G.Horace(~3.7 each)

https://backpack.tf/profiles/76561198115721685#!/compare/1511913600/1512000000

Mini on rancho: https://backpack.tf/profiles/76561198115721685#!/compare/1512604800/1512777600

http://www.tf2outpost.com/trade/29433344#latest B/o was 280, this offer is around ~220.

Sale 3: https://backpack.tf/profiles/76561198046399530#!/compare/1512086400/1512259200 75 pure

Sale 4: https://backpack.tf/profiles/76561198026518864#!/compare/1512259200/1512345600 1:1 with a purple energy cotton head. Probably high,offer around 310.

Mini on the cotton: https://backpack.tf/profiles/76561198053717045#!/compare/1513468800/1513555200 Sold with a searing plasma gatsby(23)+4 keys for a c.tf logo virtual and g.energy DCO.

Sale 5: https://backpack.tf/profiles/76561198026518864#!/compare/1512950400/1513036800 Sold with a spec.Killstreak aussie frontier(11.7 keys)+Silver Cyclon Zoomin(updated price for 40,but seller for 15 3 days ago) for Ghastly Ghost Flippin(105). 105-26.7=78.3 keys, rounding to 80.

Sale 6: https://backpack.tf/profiles/76561198079370388#!/compare/1512950400/1513036800 Sold for SS Shred Alert+Holy Grail Schadenfreude+Steaming Festive Tree+Holy Grail Victory Lap(175)+Terror Watt Virus Doctor. Probably High,Around 270.

Sale 7: https://backpack.tf/profiles/76561198090869623#!/compare/1513987200/1514073600 1:1 for a c. peace Pullover Not using this sale.

Sale 8: https://backpack.tf/profiles/76561198000501813#!/compare/1510876800/1510963200 Sold for a Skill Gotten Gains Rock, Paper, Scissors, a Tesla Coil Spirit of the Bombing Past(12), a Strange Potassium Bonnett(22 Keys) and ~43 Keys in Sweets.

RPS, seller for 20 keys 15 days ago. https://i.imgur.com/5dW3csg.png Around 97.

Sales at 75,80,87,97,220,270,310.

97 rounding to 100.

Ranging 75-100.