Most on the market are looking for offers or just don't give a price at all. These are the only sellers with a price I could find on outpost.

For backpack.tf price:

http://www.tf2outpost.com/trade/25178608

For 1.33 ref:

http://www.tf2outpost.com/trade/25610260

http://www.tf2outpost.com/trade/25877830

For 1.66 ref:

http://www.tf2outpost.com/trade/24753886

For 2 ref:

http://www.tf2outpost.com/trade/25889062

After looking at these sellers and your (not that clear) sold links I agree with this price range. I recommend showing a picture of your trade in wich you traded Li'l Snaggletooth.