5 Months old price, needs an update:

B/Os below range: http://www.tf2outpost.com/trade/11950894 (2.5buds, 2 months)

http://www.tf2outpost.com/trade/13494034 (2buds+8keys)

http://www.tf2outpost.com/trade/13482775 (2.4buds)

http://www.tf2outpost.com/trade/12305564 (claims to "quicksell" for 2.5)

First Sale: http://www.tf2outpost.com/trade/11632842

Sold for 2buds + TS Bills (buds being 24keys at that time, 48+9=57keys, so ~2.37buds)

Second Sale: http://www.tf2outpost.com/trade/9205790 (Look at Lamecodename's Hidden post)

Sold for Blizzardy Storm Reggae + 1 bud + 9 keys [Buds being 24keys at that time and raggae middle range being 1.7, 1.7buds + 1buds + 9keys = ~3buds, ~2.7buds w/ overpay.]

Third Sale: http://www.tf2outpost.com/trade/13734780

Sold for Haunted Ghosts Dr's Dapper Topper (2.65buds, ~2.38buds after overpay)

Forth Sale: http://www.tf2outpost.com/trade/13699002

Sold for Lime Max Head + Vintage LugerMorph (~2.5buds)

Fifth Sale: http://www.tf2outpost.com/trade/11515201

Sold for 2buds + bill + sweets (buds being 24keys at that time and bills at 8keys, ~2.35 w/o sweets, which are to me unknown)