K, lets do this one.

7 months old price

http://www.tf2outpost.com/trade/12728436 - 5 buds b/o, 3 months old, sold for it(?)

http://www.tf2outpost.com/trade/13125458 - 7 buds b/o, 3 months old, sold for Lantern Attendant (5-5.4 buds)

http://www.tf2outpost.com/trade/13716237 - Sold for Eerie Company Man (6.3-8, 1 year old price)

http://www.tf2outpost.com/trade/14693983 - Sold this + S. Pan + S. Original + Uncraft All-Father (0.8 buds) for 13th Honcho's (6.5-7.5 buds, 9 months old price) = 5.7-6.7 buds

http://www.tf2outpost.com/trade/14853253 - Sold for Stormy storm TC (5.4-6 buds)

Upper is 5.7 because Eerie Company Man has a 1 year old price, which is too old for me to set as the upper value.