I take no credit for the proof.

http://www.tf2outpost.com/trade/23224289 --> http://www.tf2outpost.com/trade/23246386 HOUWAR(10 buds) - Smoking Hoodie(~1.1-1.2-->1 http://www.tf2outpost.com/item/440,3081728910,377,5 )~ 9 buds

http://www.tf2outpost.com/trade/23248892 sold for ~ PE Noble(~5-5.8--> after overpay 4.9 )+Flies Brigade(~15-18 keys -->0.9)+Gifted Sunbeams Tyrannus( dont know ??) but here http://www.tf2outpost.com/trade/23224289 DOODXD offered ~10 in mix --> ~10+

And your sale :4.5 buds+Hearts Noble (5.1-5.9-->5) ~9.5

4.5 buds pure + clean hearts noble (5.5 buds) http://imgur.com/QTrm4ra Noble is ~5 with overpay. Putting this sale at 9.5

so sales at 9, 9.5, and 9.5

9-9.5 should be fair