Hasn't been updated in awhile, so just thought I'd make some small adjustments.

http://www.tf2outpost.com/trade/11550753

Sold for Blizz Bombing Run + 2 Keys (19)

I just sold mine for Planets Sultan + 3 Keys (19)

http://www.tf2outpost.com/trade/13625581

B/O of 21, notable offers include:

18 pure

Bubble Crocleather + 1 (Retracted, 19)

http://www.tf2outpost.com/trade/13929389

B/O of 20, no offers

http://www.tf2outpost.com/trade/13846561

Notable offers: Bubbles Dapper (Retracted, 20)

Steaming Private Eye if he adds sweets (20?)

http://www.tf2outpost.com/trade/13761021

Offer of 18 Keys

http://www.tf2outpost.com/trade/13756483

Sold for 16-17 + a key or two in items (18)

http://www.tf2outpost.com/trade/13912131

Adding a key for gifted bud (17)

Should be enough proof