Range is 2-2.3 because of sales. There are a few B/Os that are close but b/os significantly over this range don't get sold.

EDIT: Fixed range.

Sales:

Sold for a Time Warp Bombing Run (2-2.3 buds)

http://www.tf2outpost.com/trade/14911637 ---> http://www.tf2outpost.com/trade/14926031

Sold for a Planets Tossle (2-2.2)

http://www.tf2outpost.com/trade/14926025 ----> http://www.tf2outpost.com/trade/14984320

Sold for a Stormy Fez + Strange Merc's Pride = ~2.3 buds

http://www.tf2outpost.com/trade/14436311 --->

http://www.tf2outpost.com/trade/14436311

Sold for a Steaming Brown Bomber (2-2.3 buds)

http://www.tf2outpost.com/trade/15359721 --->

http://www.tf2outpost.com/trade/15555633

Sold for a Steaming Bonk Boy (2-2.4)

http://www.tf2outpost.com/trade/14949712 ---->

http://www.tf2outpost.com/trade/15217599

Sold for a Circling Heart Copper's Hard Top (1.7-2.1)

http://www.tf2outpost.com/trade/15189020---->

http://www.tf2outpost.com/trade/15265589

B/Os:

2.5

http://www.tf2outpost.com/trade/15564059

2.5

http://www.tf2outpost.com/trade/15581846

3 buds

http://www.tf2outpost.com/trade/15523461

50 keys

http://www.tf2outpost.com/trade/14478772

3 buds

http://www.tf2outpost.com/trade/14840935

50 keys

http://www.tf2outpost.com/trade/15387754

51 keys

http://www.tf2outpost.com/trade/15366470

3 buds

http://www.tf2outpost.com/trade/13743919

3.5 buds

http://www.tf2outpost.com/trade/15312372