price is 6 month old so imma make my first suggestion:P

my post: http://www.tf2outpost.com/trade/12908102 5.5 offer/blizzardy ke(5.3 middle range)+13 keys+ebenzer=around 6 buds taking in the account for unusual overpay would be 5.5ish

http://www.tf2outpost.com/trade/12780421 sold for green energy drill(4.5)+dragonclaw(dota 2 item 2buds) around 6 mixed.in his history on tf2outpost he sold claw for 2 buds/drill for 4.5

there only 2 sales i can think of recently since the other 4-5 have no c/o/sold offers

feel free to criticize this post. sorry forgot about the high end