Wow

Sale #1

Sold for DBD HWNN

http://backpack.tf/profiles/76561198011321852#!/compare/1460592000/1460678400

Was used to update the HWNN

Sale #2

http://backpack.tf/profiles/76561198079315133#!/compare/1460937600/1461110400

Outlier

Sale #3

Sold for Puzzle Hellmet

http://backpack.tf/profiles/76561198088192753#!/compare/1461196800/1461283200

46

Sale #4

Sold for Pro Ks Aussie Sniper + Pro Ks Blood Botkiller Sniper

http://backpack.tf/profiles/76561198072206913#!/compare/1461369600/1461456000

50-55ish

Sale #5

Sold for Spec Ks Aussie Sniper

http://backpack.tf/profiles/76561198090737788#!/compare/1461283200/1461456000

Outlier, Why would you buy it for a Pro Ks Aussie Sniper and resell it for a Spec Ks one? xD

Sale #6

Sold for Pro Ks Aussie Rocket

http://backpack.tf/profiles/76561198090737788#!/compare/1462233600/1463702400 - 15 days escrow

Capped at 70 - http://www.tf2outpost.com/trade/28106567

Conclusion

I feel like a large range is needed for most unusual weapons because there are sales all over the place due to them having no price.

Final price: 46 - 70