Unsolds for 7 keys

http://www.tf2outpost.com/trade/19567522 5 days

http://www.tf2outpost.com/trade/19561575 5 days

http://www.tf2outpost.com/trade/19557932 6 days

http://www.tf2outpost.com/trade/19544197 6 days

http://www.tf2outpost.com/trade/19421642 1 week

http://www.tf2outpost.com/trade/19525703 1 week

http://www.tf2outpost.com/trade/19492799 1 week

http://www.tf2outpost.com/trade/19332319 2 weeks

http://www.tf2outpost.com/trade/19366999 2 weeks

http://www.tf2outpost.com/trade/19176795 3 weeks

http://www.tf2outpost.com/trade/18861591 1 month

Selling for less than 7 keys

http://www.tf2outpost.com/trade/19592135 6.5 keys

http://www.tf2outpost.com/trade/19255213 6 keys 5 ref

http://www.tf2outpost.com/trade/19648113 7 keys with strange part

http://www.tf2outpost.com/trade/19591680 specialized killstreak 7 keys

http://www.tf2outpost.com/trade/19469152 killstreak for 7 keys

http://www.tf2outpost.com/trade/19594390 Killstreak for 7 keys

Also first 5 listings on classified are all for less than 7 keys.

sorry if the list doesnt seem very complete, since most of them were killstreak.