A number of sales, 3 known, but one includes unpriced robo hats

Sales

http://www.tf2outpost.com/trade/11245329 - accepted an offer of a Ghost Bubble Pipe, having the owner add a bud and an Ap Sap {~4.1 buds}

http://www.tf2outpost.com/trade/11154143 - Accepted an offer of a Stormy Killer Exclusive {~4.7}

Current Listings

http://www.tf2outpost.com/trade/11409487 - Got a lowball of 1 bud, got a retracted offer of a a Sandvich box {~5 buds}, and rejected an offer of a Blizzardy Killer's Exclusive {~4.1}

http://www.tf2outpost.com/trade/11308891 - Rejected an offer with a bunch of unpriced Robo hats, and rejected another Stormy KE {4.7}

http://www.tf2outpost.com/trade/11443171 - Kinda irrelevant, got an offer of an unpriced Robo hat, and a lowball of 1 bud and 8 keys.

Conclusion

Low end was set to 4.1, as one sale was at that price, and one offer made at that price. High end set to 4.8 because of the the sale made a little below that price, and an offer rejected a little below that price.

Unusual overpay has been calculated for all Unusual offers

Feedback is appreciated!