I think it's too low personally so I'd wait for another sale but keep this up in the meantime.

http://backpack.tf/item/3104623417 - Added with the Swagman

http://backpack.tf/item/2641649580 - Probably added with the Purple Range... was requested here ( http://www.tf2outpost.com/trade/26440093 ), disappeared from the buyer's backpack on the same day, and the seller's backpack was not scanned for another 8 days after the trade (during which time the Collector's Razorback changed hands again). Moreover, it doesn't make sense for the Range to be offered 1:1, and for the Swagman seller to then request sweets, only to then wind up adding a key themselves without receiving anything extra. Wish I could find more definitive proof, but that's all I've got.