Proof below. Overpay calculated. Original prices used

Sales

http://www.tf2outpost.com/trade/13736224

http://backpack.tf/id/76561198045381704?time=1381474800 ---> http://backpack.tf/id/76561198045381704?time=1381561200

Mann's Mint Max (lvl 72) + 3 keys + 4.66 = 2.6 buds

Side note: Buds were around 18 keys at the time.

http://backpack.tf/id/76561197996177079?time=1382252400 ---> http://backpack.tf/id/76561197996177079?time=1382338800

Cloud 9 Cone, other guy added 6 keys = 1.9 buds

Side note: Buds were around 17 at the time. I also used to own dat Cone :3 Good times... (no, not really, actually)

Conclusion

Two simple sales, vote accordingly.

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