It's my first suggestion (at least my first professional try to make one) so be easy ;)

Unsolds for 8 ref:

http://www.tf2outpost.com/trade/25441113 - 4 days old

http://www.tf2outpost.com/trade/25417623 - 6 days old

http://www.tf2outpost.com/trade/25467048 - 2 days old

http://www.tf2outpost.com/trade/25473572 - Selling 3, still didn't sold one

http://www.tf2outpost.com/trade/25308923 - 2 weeks ago

http://www.tf2outpost.com/trade/25335746 - 2 weeks ago

http://www.tf2outpost.com/trade/25476990 - 1 week ago

http://www.tf2outpost.com/trade/25482025 - 1 day ago

http://www.tf2outpost.com/trade/25401981 - 1 day ago

Sellers for 7.66:

http://www.tf2outpost.com/trade/25307788

http://www.tf2outpost.com/trade/25446297

http://www.tf2outpost.com/trade/25451133

http://www.tf2outpost.com/trade/25402367

http://www.tf2outpost.com/trade/25425401

http://www.tf2outpost.com/trade/25446297

Sellers for 7.55:

http://www.tf2outpost.com/trade/25426258

Sellers for 7 ref:

http://prntscr.com/6liptv - Selling 56 paints for 7 ref each

Classifieds:

2x (7 ref)

1x (7.22 ref)

5x (7.33 ref)

1x (7.44 ref)

1x (7.55 ref)