http://puu.sh/2QRzG.png - 1 seller for 6 keys, 2 for 7

Unsold for 6 keys :

http://www.tf2outpost.com/trade/10584996 - 5 days

Unsold for 6.5 keys :

http://www.tf2outpost.com/trade/10393153 - 1 week

Unsold for 7 keys :

http://www.tf2outpost.com/trade/9566159 - 1 month !

http://www.tf2outpost.com/trade/10185465 - 3 weeks, a guy offerd 6.5 keys

http://www.tf2outpost.com/trade/10274033 - 2 weeks

http://www.tf2outpost.com/trade/10432969 - 1 week

http://www.tf2outpost.com/trade/10518602 - 1 week

http://www.tf2outpost.com/trade/10520391 - 1 week, no bump

http://www.tf2outpost.com/trade/10514171 - 1 week, no bump

http://www.tf2outpost.com/trade/10554916 - 6 days

http://www.tf2outpost.com/trade/10546931 - 6 days

http://www.tf2outpost.com/trade/10602957 - 4 days

http://www.tf2outpost.com/trade/10616184 - 4 days

http://www.tf2outpost.com/trade/10672028 - 1 day

http://www.tf2outpost.com/trade/10682377 - 21 hours

http://www.tf2outpost.com/trade/10684418 - 18 hours, will sell for 6.5

http://www.tf2outpost.com/trade/10688195 - 13 hours (x2)

Buyers :

http://www.tf2outpost.com/trade/9529753 - 2 people added for 4 keys and a guy willing to sell for 5 keys

http://www.tf2outpost.com/trade/9606856 - a guy added for 4 keys

http://www.tf2outpost.com/trade/10633656 - a guy willing to sell for 5 keys

~adding more~