2 sales, But I don't know how to track Marketplace.tf sales without asking the person directly.

So I'll post the one trackable one for now.

Sale 1:

https://backpack.tf/profiles/76561197964782863#!/compare/1516665600/1516752000 Seller

https://backpack.tf/profiles/76561198040616281#!/compare/1516665600/1516752000 Buyer

Sold for 685 pure + Pro KS Gunslinger(22.86) + Showstopper Shred Alert +Festive FNPro KS Rainbow Grenade Launcher(12.45) + Festive Pro KS MW Cool Flash Fryer Flame Thrower +Cat Companions(21.78).

Shred Mini:

https://backpack.tf/profiles/76561198182281603#!/compare/1516060800/1516665600

sold for 40 pure

https://backpack.tf/profiles/76561198113870841#!/compare/1514764800/1514937600

sold for Peace Sign Slouch(20) + 5 keys = 25 keys

https://backpack.tf/profiles/76561198149211008#!/compare/1516752000/1516924800 Seller

https://backpack.tf/profiles/76561198273690159#!/compare/1516838400/1516924800 Buyer

Sold for Strange D@D Napolean(32) + 1.69 keys in sweets = 33.69 (Rounding to 34)

https://backpack.tf/profiles/76561198149211008#!/compare/1516406400/1516492800

Sold for 35 pure

https://backpack.tf/profiles/76561198004383856#!/compare/1515715200/1515888000

Sold for 30 pure

25, 30, 34, 35, 40

25 seems to be outlier, ranging at 30-40. or average of 35.

Flamethrower has no price, but Isotope MW Flash Fryer priced at 110 keys, Strange MW Flash Fryer with Cool has price of 266 keys.

I'd guess a price closer to Isotope Flash Fryer is better, as the other one is strange.

Flamethrower at 110 keys.

All together thats:

685 + 22.86 + 35 + 12.45 + 110 + 21.78 = 887.09

Rounding to 890 keys.

Note: If anyone has a better way to find/price the fryer or Shred Alert, I'll re-suggest. That's the best data I was able to get.