5 months old. Got offered one for 22 keys in items, so I decided to see what it was really worth.

ACTUAL TRADES:

21 keys - http://www.tf2outpost.com/trade/10012906 - traded 1:1 with s machina (reliable 21 key sale)

CURRENT TRADES/OFFERS:

http://www.tf2outpost.com/trade/10048613 - no B/O

Best offer: 23 keys in unusuals (stormy fruit shoot if seller adds a s huntsman)

http://www.tf2outpost.com/trade/10101507 - B/O 27 keys

Best Offer: none yet (5 hours old)

http://www.tf2outpost.com/trade/8979059 - B/O 2 buds - sold for s machina

Best Offer: 24.5 keys in unusuals

http://www.tf2outpost.com/trade/9343782 - no B/O

Best Offer: 24 keys

http://www.tf2outpost.com/trade/10041891 - no B/O

Best Offer: 25 keys in unusuals (smoking jeepcap)

http://www.tf2outpost.com/trade/10085835 - B/O: 25 keys

Best Offer: none (21 hours old)

http://www.tf2outpost.com/trade/10039957 - B/O 24 keys

Best Offer: none (2 days old)

Cheapest it has sold: 21 keys.

Highest documented offer: 24 keys pure (on a 1 month trade). Also a B/O at 24.

Price: 21-24.

All the best offers fall within this range after accounting for unusual overpay.