Re-suggesting with a range as Polar suggested;

Counter to - http://backpack.tf/vote/id/56ee0d41ba8d88f172186351

Sale 1 - http://postimg.org/image/8gtkmz727/ - 6 ref

Sale 2 - http://postimg.org/image/uvxkubdad/ - 6 ref

Sale 3 - https://imgur.com/a/n4EiV (credits to Alberny) - 6 ref

Several sold at 4 ref - http://www.tf2outpost.com/trade/27942408

Classies at this time - http://postimg.org/image/oaa0pz2tb/ - 1 @ 5, every other one at 6 ref or above. 3 buyers at or above pre-multiclass update price.

Outpost - 1 valid @ 6 ref - http://www.tf2outpost.com/trade/27956335

only other one on outpost that's not painted is unbumped for 3 days + and isn't priced - http://www.tf2outpost.com/trade/27943448

Going with 4 to 6 ref (as Polar suggested), trying to include all the easily trackable sales from the last 2 weeks.