Hiya!

Sellers -

http://prntscr.com/4gq0ti 2.4 Keys

http://prntscr.com/4gq14v 2.4 Keys

http://prntscr.com/4gq101 2.5 Keys

http://www.tf2outpost.com/trade/22122285 2.8 Keys

http://www.tf2outpost.com/trade/22032430 3 Keys

http://www.tf2outpost.com/trade/22133052 3 Keys

http://prntscr.com/4gq26n 3 Keys

http://prntscr.com/4gq0ne 3 Keys

Classifieds: http://backpack.tf/classifieds/?item=Blutsauger&quality=14&tradable=1&craftable=1

http://prntscr.com/4gq73t

x1 @ 2.36 Keys

x1 @ 2.72 Keys

x3 @ 3 Keys

x1 @ 3.54 Keys

Solds -

http://www.tf2outpost.com/trade/21654477 Sold for 2.4 Keys.

Conclusion:

There are many sellers selling for a different amount (Obviously). I found 1 sold at 2.4 Keys which is where most of the sellers are at. 3 Keys is still possible, you could say, but it would definitely take a while. But really, almost every price is possible.

Anyways, Feedback / Help is appreciated.

I will add more proof if necessary.