RESUGGESTING ( i hope for the last time ) :

Sold for one bud : http://www.tf2outpost.com/trade/20147653

Sold for one bud : http://www.tf2outpost.com/trade/20110286 and http://www.tf2outpost.com/trade/20147588 (check bud's history )

New infos from BigBlackMan ( thanks a lot ) + Gent's tip (thanks a lot):

sold for 25 keys + sweets worth 10-12 keys 5 days ago http://www.tf2outpost.com/trade/20007555 --->25/17+10/17= 2.05= 2

sold for 1 bud + 11 keys one month ago http://www.tf2outpost.com/trade/19564566 --> 1 + 11/18 = 1.6

sold for 2 buds in keys 1 month ago too : http://www.tf2outpost.com/trade/17942357 ( thanks to lord scrubbington )

Thanks for your time and attention