Second attempt at suggestion. Got all of the sales in it now! (Thanks Sin!)

Sales:

Sale One:

One sale 12 days ago for 17 keys pure:

http://backpack.tf/profiles/76561198147955016#!/compare/1492905600/1492992000

Clean: http://backpack.tf/item/4580527699

Sale Two:

Another sale 22 days ago, but looks like a donation?

http://backpack.tf/profiles/76561198084692154#!/compare/1492128000/1492214400

http://backpack.tf/profiles/76561198306787423#!/compare/1492128000/1492214400

Clean: http://backpack.tf/item/2526040650

This sale can’t be used as it appears that there was no payment.

Sale #3

Sold for a Flaming Lantern Trophy Belt along with ~8 keys in stuff.

http://backpack.tf/profiles/76561198026753008#!/compare/1488844800/1488931200

http://backpack.tf/profiles/76561198099260958#!/compare/1488844800/1488931200

http://www.tf2outpost.com/trade/28820790 B/O of 16k

Taking 16k

Sale #4

Sold for a Green Black Hole Desert Marauder {?} {Probably Bulk}

http://backpack.tf/profiles/76561198099260958#!/compare/1490572800/1490659200

http://backpack.tf/profiles/76561198153059051#!/compare/1490486400/1490659200

{Excluding}

Sale #5

{Bulk}

http://backpack.tf/profiles/76561198153059051#!/compare/1490659200/1490745600

http://backpack.tf/profiles/76561198047838805#!/compare/1490659200/1490745600

{Excluding}

Sale #6

{Bulk}

http://backpack.tf/profiles/76561198047838805#!/compare/1490832000/1490918400

http://backpack.tf/profiles/76561198160082989#!/compare/1490832000/1490918400

{Excluding}

Sale #7

Sale Untraceable.

http://backpack.tf/profiles/76561198160082989#!/compare/1491004800/1491091200

http://backpack.tf/profiles/76561198084692154#!/compare/1490745600/1491091200

{Excluding}

Sellers:

Two classifieds on backpack listings:

http://backpack.tf/classifieds?item=Crocleather+Slouch&quality=5&tradable=1&craftable=1&particle=61&australium=-1&killstreak_tier=0

One at 17 keys, clean. Listed 3 days ago, bumped.

Another at 24 keys, listed 16 days ago, clearly not selling too well.

Two listings on tf2outpost:

http://www.tf2outpost.com/search/270329898

Spirit selling at 24 keys, trade created 5 days ago.

Another seller at 18 keys, listed a month ago. Not sold.

One listed on on marketplace.tf for $33 = 15.78 keys, duped, not sold. No other marketplace.tf sales.

Buyers:

http://backpack.tf/classifieds?item=Crocleather+Slouch&quality=5&tradable=1&craftable=1&particle=61&australium=-1&killstreak_tier=0

Backpack.tf buy orders are for 13.47 keys

No buyers on tf2outpost.

Suggesting at 16-17 keys.

Big thanks to Sin!

Please give me any constructive criticism! It is my second suggestion.