Sorry for having to repost - Annoys me all the same that there's some buried rule in the forums I didn't know about. I go through all the trouble of reading the rules before posting, but apparently that's not enough.

Recently sold this lovely hat for 75 refined + TS bills.

I also got some notable offers :)

http://www.tf2outpost.com/trade/13803123 <-- My trade

I got an offer of a NnB Vintage Tyrolean + SF Sandvich (Would have taken, but I'd sold it by that point)

I also got a tent offer of a gifted NnB Ze Goggles + 1 of every medic unique item in the game. (Valued around a bud)

http://i.imgur.com/cwAACIF.png <-- Da proof of transaction

First sale - http://www.tf2outpost.com/trade/13689712

Sold for 15 keys.

Second sale (Where I obtained the hat.)

Memory Leak Bubble Pipe for gifted GE merryweather + Nuts n bolts Titanium Tyrolean.

http://i.imgur.com/PJbH0o7.png

Just a formality, to show all known sales of this hat.

In summary, both solid sales are pure sales, the memory leak bubble pipe has no set price. Anybody attempting to record it's price, feel free to use this as proof.