Only sale within 3 months. Sale happened on the 14th of september as what i can make out of from the steam market graph.

Sale #1

http://www.tf2outpost.com/trade/22563710 b/o 4 buds

Sold for 230 dollars on the steam market.(200 dollars after steam tax)

Chat with seller

http://i.imgur.com/teuXBnP.png

Calculation: 200 dollars / 33 dollars(Taking 1 bud as 33 dollars) = ~6 buds

Total: ~6 buds. However, seller's b/o on tf2outpost is 4 buds. Taking 4 buds as price.