I just bought this for ~2 buds and sold it for a Green Energy Ten Gallon which here is priced 3.1 - 3.6 Factoring in unusual overpay this is about 3.

http://www.tf2outpost.com/trade/11297984 - was asking for 3.5 but he came down to ~2 buds

Proof of my purchase and sell: http://i.imgur.com/CW491FX.png (gunslinger ~24 keys, stranges ~12 keys and i gave him 7 keys but i promised him I'd give him a copy of hotline miami (3 keys)

I'm just trying to get a ballpark price here, first unusual suggestion ever. This was the only one on outpost (none on bazaar.tf and none on classifieds) so this is the proof.

Remade for you guys :D