KoDoRiN : "Clean and dirty ones are practically the same. This is to prevent people thinking one is worth more than the other when really they're the same with the exact same purpose.."

2 pages of sellers at 7 ref on classies. There is a buyer on classies @ 7, but he doesn't have any pure to buy the tags with, so invalid.

Unsolds @ 7.11

http://www.tf2outpost.com/trade/27585057(4 days)

http://www.tf2outpost.com/trade/27589957 (3 days)

tl;dr: A TON of sellers on classifieds for 7 ref.