http://www.tf2outpost.com/trade/11109778 had some 30 keys offer (most recent that got rejected was jun 28, other offers later got retracted.)

http://www.tf2outpost.com/trade/11109778

22:48 - «[N-G]» NewJorciks [LV] ♋: hi

22:49 - Wesley: hi

22:49 - Wesley: sorry for not buying anything, but i'd like to ask you a question

22:49 - «[N-G]» NewJorciks [LV] ♋: ufffffffffffff

22:49 - Wesley: you owned a tf logo seargeant drill hat a while ago, and i'd like to update the price on bp.tf, do you perhaps know how much you bought and sold it for?

22:50 - «[N-G]» NewJorciks [LV] ♋: how far back was it?

22:50 - Wesley: 3 weeks

22:50 - «[N-G]» NewJorciks [LV] ♋: thats so far in my trading history -_-, ill see what i can do

22:51 - Wesley: thanks, i can give you a free s. shovel for the time spent.

22:51 - «[N-G]» NewJorciks [LV] ♋: no its good :), watching a movie in background

22:52 - «[N-G]» NewJorciks [LV] ♋: bought for 21 keys, sold for bud + 7 keys 2 days later

22:52 - Wesley: ok, thanks for the help, i really appreciate it.

22:52 - «[N-G]» NewJorciks [LV] ♋: np, byee

22:52 - Wesley: bye.

22:52 - «[N-G]» NewJorciks [LV] ♋ is now Offline.

the 21 keys was probbably a quicksell http://www.tf2outpost.com/trade/11428636 he was buying quicksell at that time, and 21 keys seems a little bit low.

http://www.tf2outpost.com/trade/12419323

offer of a black clean juju + g. app-sap + gold botkillre mk1 flamethrower with parts. (~27 keys)

so there has been a sale for 29-30 keys 3 weeks ago

and some 30 keys offers.