11 months old. Logo is awesome.

None on the market, two recent trades.

http://www.tf2outpost.com/trade/10599955

I bought it for 1 bud, and he added some items worth ~2 keys (at the time, buds were worth ~23 keys):

http://imgur.com/GHH9Vft

http://www.tf2outpost.com/trade/10700948

I sold this after a month on the market for 1 pure.

http://imgur.com/y3BWhdt

Some that were previously on the market:

http://www.tf2outpost.com/trade/10903526

- 17 keys

http://www.tf2outpost.com/trade/11136419

- 14 Robo keys (16-17 keys at the time)

- 17 keys (again)

That's all the proof I could find. Low end is set due to the offers, my purchase sits in the middle of the range, and my sale is at the high end.