Used this as a mini, so let's suggest it.

Sale 1

Sold for 17 keys

http://backpack.tf/profiles/76561197972404012#!/compare/1468108800/1468195200

http://www.tf2outpost.com/trade/28311035 ----- B/O was 20 keys

=======> 17 keys

======================================================

Sale 2

Quicksold for... 14 keys? Can't say for sure.

http://backpack.tf/profiles/76561198258102573#!/compare/1467417600/1467590400

http://backpack.tf/profiles/76561197972404012#!/compare/1467331200/1467417600

http://www.tf2outpost.com/trade/28303958 ----- B/O was 16 keys

=======> Not using

======================================================

Sale 3

Bought from Scrap.tf for ... 14 keys?

http://backpack.tf/profiles/76561198258102573#!/compare/1467331200/1467417600

=======> Not using

======================================================

Sale 4

Sold to Scrap.tf for keys

http://backpack.tf/profiles/76561197975638235#!/compare/1466985600/1467590400

=======> Not using

======================================================

Sellers

- http://imgur.com/a/Q0av6 ----- 25 keys

Summary

- Sale for 17 keys.

Going with 17 keys. It's a recent full pure sale.

Criticism appreciated!