Proof below. Overpay calculated

http://www.tf2outpost.com/trade/13392529 - 1 bud = 22 keys

Side note: Using price of buds roughly 1 month-ish ago

http://www.tf2outpost.com/trade/13257645 - Smoking Capotain + 2 keys = 17 keys

http://www.tf2outpost.com/trade/13114123 - Peace Tricorne + 1 key-ish it seems = 22 keys

Conclusion

None currently on the market, so this is what I can use for now. Vote accordingly.

Help / Constructive Criticism / Additional Proof / Counter-Proof is ALWAYS welcome! >;3