Proof below. Overpay calculated. Original prices used

Sales

http://www.tf2outpost.com/trade/15795074 - Beams Scotsman's = 4.8 buds

Side note: Taking mid price since it was offered on

http://www.tf2outpost.com/trade/15546690

http://backpack.tf/id/76561198098589781?time=1384588800 ---> http://backpack.tf/id/76561198098589781?time=1384675200

GE Reggae, other guy added 32 keys = 3.4 buds (outlier)

Buds = 19 keys

http://www.tf2outpost.com/trade/15246472

http://backpack.tf/id/76561198057625216?time=1383552000 ---> http://backpack.tf/id/76561198057625216?time=1383638400

Seems to be Beams Sultan + 40 keys = 5.4 buds

Conclusion

Eh, this is what I found. Vote accordingly.

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