It seems, last Suggest has no range.

So, proofs:

http://www.tf2outpost.com/trade/11450705

b/o 5 buds

offers

smoking TC - 5 buds

Harvest Moon Medic's Mountain Cap - 5,6 buds

3 earbuds, a clean juju and 10 robo keys ( 4,3 buds pure)

http://www.tf2outpost.com/trade/12353413

b/o - 5 buds

offers

Sunbeams Pickehaube - 5 buds

_______________

Sales:

http://www.tf2outpost.com/trade/11988460 2.5+0,7+1,4 (electrostatic trade http://www.tf2outpost.com/trade/11817627 sold for 32 keys)

4,6 in unusuals.

http://www.tf2outpost.com/trade/12088999

4.3 in unusuals and intems

http://www.tf2outpost.com/trade/11795675

52 keys and max head 4,5 pure

so

4,3-4,6 would be correct for it.