Only 1 in existance, 1 on the market. 2 sales so far.

http://www.tf2outpost.com/trade/11795063 ------->

http://www.tf2outpost.com/trade/12103216 ------->

http://www.tf2outpost.com/trade/12282513

Sales for:

a) 1:1 with green fetti pyromance (1-1.2 buds); probably can't count because: http://image-upload.de/image/baAEaY/77ba5ba8ad.png

b) 1:1 with steaming war pig (3.1-4.5 buds): http://www.tf2outpost.com/trade/12221983

Offers (in trades and according to seller):

a) 3 buds pure: http://www.tf2outpost.com/trade/11795063

b) holiday headcase + 1 bud (=~4 buds):

c) bliz TC twice (4.8-5.5): http://www.tf2outpost.com/trade/12103216

d) Hearts private eye(~3 buds due to old price) + lvl 1 max (=~5 buds): http://image-upload.de/image/chCKSk/9dd9a6b4f8.png

So calculating unusual and item overpay and leaving out the first sale it results in this range.