Only one Non-Gifted, has 2 sales:

http://www.tf2outpost.com/trade/15576839

sold for 33.5 keys pure=2.1 buds

http://www.tf2outpost.com/trade/15421943

Sold for Clean Flip-Flops(1.9-2buds) + x2Taunt Kills Part(1.5-1.7 keys each at the time of sale) + insignificant/irrelevant sweets (seemingly below a key in value)=2.1 buds in items. With overpay calculated (2.1 times .9), this comes out to 1.9 buds, brining us to our range of:

*drumroll*

1.9-2.1 buds