4 on the market,not sure how many exists (stats page says 7, unusual prices page says 4).

http://www.tf2outpost.com/trade/19864304 an overclocked snaggletooth was bought with it: 1.9

http://www.tf2outpost.com/trade/19916317 sold for a stormy bubble pipe: 1.7*0.9 = 1.53

I checked the history of the backpacks, no sweets were added.

http://www.tf2outpost.com/trade/19830042 B/O: 1.75

http://www.tf2outpost.com/trade/19580956 B/O: 2

http://www.tf2outpost.com/trade/19947812 B/O:1.6 (very young trade)

http://www.tf2outpost.com/trade/19898430 no B/O

These proofs and sales were taken into consideration when calculating the range. Any feedback, proofs, counter-proofs, better range suggestion are appreciated and I will act and respond accordingly.