I sold my Green Energy Shako (only one that was on the market) last weekend, and here are some offers I got on it within the last two weeks, via my trade http://www.tf2outpost.com/trade/7587204

2 buds + Big Kill + 20 keys (3.3 buds pure)

Stormy Storm Tosslecap (3.2 - 3.5 buds)

Scorching Gentleman's Gatsby (2.9 - 3.3 buds)

Scorching Madame Dixie + 1 bud + SF Grenade Launcher (2.5 - 2.7 buds plus 1.5 pure = around 4 buds)

Lower bound is 3 buds because I consistently got 3-3.5 bud unusual offers and a 3.3 bud pure offer. Upper bound is 3.5 buds because I sold mine for 4 buds, but that kind of offer is uncommon.