Owning 1 and prepared for blindvotes.

Sale #1

http://i.imgur.com/MEd7IMD.png

Bought mine (almost level 69, damn) for 110 TF2 pure + 40 CS pure, can't exceed the B/O of 150 keys ( http://www.tf2outpost.com/trade/27214266 )

Sale #2

http://backpack.tf/profiles/76561198162018758?time=1446361200 -> http://backpack.tf/profiles/76561198162018758?time=1446537600

Sorting items by time -> sold for 125 pure + Max + shitload of sweets (6.7 keys of items above 1 key + 31 ref of items between 1 ref and a key + 130 robo-parts at 0.33 ref + 200 items at 0.05ref)

x = 125 + (28.5 + 6.7 + 1.9 + 2.7 + 0.7)*0.9 = 161.45 keys ~ 160 keys high-end

Sale #3

http://www.tf2outpost.com/trade/27049473

http://backpack.tf/profiles/76561198053233649?time=1445065200 -> http://backpack.tf/profiles/76561198053233649?time=1445410800

Sold for 147 pure + Spe KS Knife kit (IDs are matching)

x = 147 + 2*0.9 = 149 ~ 150 keys

Sale #4 (from the previous suggestion, 2 months old but usable)

http://backpack.tf/vote/id/55e56246b98d88c6248b45cc

140 keys low-end

Any pertinent comments are welcome.