I really hate flies. They're annoying and disgusting. ;~;

Since this is 1 of 1 in the world, and the current owner doesn't have a TF2OP trade post up there, I wasn't able to give a link, however, below are the two histories of the items they traded.

http://backpack.tf/item/3319494639 (Massed Flies Casemaker history)

http://backpack.tf/item/1798371173 (Duped Dead Presidents Hottie's Hoodie history, notice their trading dates) + http://backpack.tf/item/2462256299 (As sweets)

So 25+2.5=27.5, and 27.5x0.9= 24.75 keys (Rounded down into 25 keys) overpay for the flies casemaker.

Dead Presidents Hottie's Hoodie mini: http://www.tf2outpost.com/trade/25745216 (Brought for a Blizzardy Storm Lord Cockswain's Pith Helmet + Stormy Storm Heavy Duty Rag. So (14+14)x0.9= 25.2 keys, rounded down into 25 keys.

Blizzardy Storm Lord Cockswain's Pith Helmet mini: http://www.tf2outpost.com/trade/25125016 (Sold for an Aussie Force-a-Nature, which is 14 keys.)

Constructive criticism is always appreciated.