So many available at under 2 Keys I don't see why you'd need to buy it for that.

Unsolds @ 2 Keys:

http://imgur.com/yOrMl6I - Screenshot of the classfields, unsolds from 9 hours to 5 days

http://www.tf2outpost.com/trade/13812557 2 Days

http://www.tf2outpost.com/trade/13685034 1 Week

http://www.tf2outpost.com/trade/13803717 3 Days

http://www.tf2outpost.com/trade/13845786 20 Hours, new

http://www.tf2outpost.com/trade/13574335 1 Week

http://www.tf2outpost.com/trade/13463034 2 Weeks!

http://www.tf2outpost.com/trade/13870247 36 Minutes, new

http://www.tf2outpost.com/trade/13859490 11 Hours w/ Name Tag, new.

http://www.tf2outpost.com/trade/13100996 4 Weeks!

Selling under 2 Keys -

http://imgur.com/S1821pE 5 Sellers under 2 Keys in classfield, 2 up for 1.5 Keys for 6 days

http://www.tf2outpost.com/trade/13719627 6 Days, 1 Key + 3 Ref

http://www.tf2outpost.com/trade/13814788 2 Days, 2 Keys for the Ap-Sap + 1 Ref

http://www.tf2outpost.com/trade/13757218 5 Days, 1.7 Keys

http://www.tf2outpost.com/trade/13803159 3 Days, 1 Key + 4 Ref

http://www.tf2outpost.com/trade/13807301 3 Days, 1 Key + 4 Ref (Again)

http://www.tf2outpost.com/trade/13869875 1 Hour, new, will add "2-3" ref to 2 Keys.

Hopefully that's enough proof.

First suggestion, feedback appreciatedc: