Another one that needs a slight adjustment,

http://www.tf2outpost.com/trade/8784830 - Sold mine for 27 keys with me adding 2 ref

http://www.tf2outpost.com/trade/9284140 - Buyout of 1.1 buds (29.7 keys with buds at 27 keys)

http://www.tf2outpost.com/trade/7765781 - Buyout of 1 bud + bills (35 keys) c/o of a bud and a key (28 keys). DUPED

http://www.tf2outpost.com/trade/9617467 - Buyout is 1 bud + 5 keys (32 keys)

http://www.tf2outpost.com/trade/9812336 - Same guy as above, lowered price, buyout is now 1 bud and 3 keys = 30 keys.

http://www.tf2outpost.com/trade/9395070 - Buyout is 1 bud + 1 scrap (27 keys + scrap)

http://www.tf2outpost.com/trade/9573317 - Another with a buyout of 1 bud + bills (35 keys)

http://www.tf2outpost.com/trade/9740520 - 36 key buyout

Current high range is 1.3 buds which (with buds at 27 keys) is 35 keys. Low range is 27.

There are buyouts of 27 + a scrap,29.7, 30, and 32 which are all lower than the current range. I feel in these situations it is best to average all the buyouts lower than the current range so this would come out to roughly 29.5 keys, which we can round down if we look at the highest closest offer which is 28 keys albeit on a duped hat (not sure if it makes a difference)

I welcome comments as always.