Proof:

http://www.tf2outpost.com/trade/14981815 - Sold for 8

http://www.tf2outpost.com/trade/15088389 - Sold for 8 in less than 2 days

http://www.tf2outpost.com/trade/15142907 - Sold for 8 in 15 hours

http://www.tf2outpost.com/trade/15146856 - Sold for 8 in 6 hours

http://www.tf2outpost.com/trade/15148897 - Sold for 8 in 2 hours

http://www.tf2outpost.com/trade/15128349 - Sold for 8 without a bump

http://www.tf2outpost.com/trade/15023441 - Sold at least 1 for 8

There are some sellers at below 8 but since 8 can sell VERY fast I see no reason to keep anything lower in range, unless someone shows enough below that weren't quicksells

At the moment of posting Classifieds had 0 below 8 (1 at 8 had Dominations but he said himself quicksell)