3 month old price. Not very rare.

Trades:

http://www.tf2outpost.com/trade/8685077 - b/o 1.2 buds

-20 keys

-bud + 5 ref

-20.5 keys

http://www.tf2outpost.com/trade/9146514 - b/o 25 keys "quciksale" (open for 6 hours)

-20 keys

-22

-23

http://www.tf2outpost.com/trade/8922197

-20 keys

http://www.tf2outpost.com/trade/9018331

-SOLD for Smoking Helmet Without a Home + Smoking Handyman's Handle + Strange Part: Gib Kills (1.1 + 20 + 1) (!)

http://www.tf2outpost.com/trade/8621777

-20 keys

http://www.tf2outpost.com/trade/9130859 - b/o 30 keys

http://www.tf2outpost.com/trade/8822874 - b/o bud + 10 (~1.4)

Since two are currently available for 30 keys or less and there are a few offers declined at less than 25 keys, this range seems reasonable and fair to buyers and sellers.