http://www.tf2outpost.com/trade/24498547 Sold for 32 keys in 2 weeks

http://www.tf2outpost.com/trade/24185612 sold for 38 keys

http://www.tf2outpost.com/trade/21714881 Seller at 35 keys

http://www.tf2outpost.com/trade/23944538 Another seller at 35 keys

http://www.tf2outpost.com/trade/24728027 unsold at 3 buds

http://www.tf2outpost.com/trade/24628816 unsold at 2.9 buds

So there has been a sale for 2.1 earbuds (32 keys), but it wasn't a quicksale because it took 2 weeks

There is also proof that it is possible to sell at 2.6 earbuds (38 keys), supporting my high-range

Anyone to add, or counter my proof is welcome!