Selling for 3-3.5keys:

http://www.tf2outpost.com/trade/15577200 3 keys +2 ref

http://www.tf2outpost.com/trade/15601662 selling 4 for 3 keys + 3 ref each

http://www.tf2outpost.com/trade/15563587 3 keys + 3 ref

http://www.tf2outpost.com/trade/15601311 selling 4 for 3.5 keys each

http://www.tf2outpost.com/trade/15600276 3.5

http://www.tf2outpost.com/trade/15581244 3.5

http://www.tf2outpost.com/trade/15595091 3.5

http://www.tf2outpost.com/trade/15580769 3.5

http://www.tf2outpost.com/trade/15584683 3.5

http://www.tf2outpost.com/trade/15601019 3.5

http://www.tf2outpost.com/trade/15592844 3 keys + 2 ref

http://www.tf2outpost.com/trade/15490342 3 keys + 3 ref

http://www.tf2outpost.com/trade/155749553 keys + 2 ref

http://www.tf2outpost.com/trade/15534550 3.5

unsold for 4 keys.

http://www.tf2outpost.com/trade/15595951 6 hours

http://www.tf2outpost.com/trade/15591454 11 hours

http://www.tf2outpost.com/trade/15591723 11 hours

http://www.tf2outpost.com/trade/15588682 14 hours

http://www.tf2outpost.com/trade/15584030 18 hours

http://www.tf2outpost.com/trade/15583377 19 hours

http://www.tf2outpost.com/trade/15564556 1 day

http://www.tf2outpost.com/trade/15563087 1 day

http://www.tf2outpost.com/trade/15571672 1 day

http://www.tf2outpost.com/trade/15564276 1 day

http://www.tf2outpost.com/trade/15561433 1 day

http://www.tf2outpost.com/trade/15558635 1 day

http://www.tf2outpost.com/trade/15569406 1 day

http://www.tf2outpost.com/trade/15540594 2 days

http://www.tf2outpost.com/trade/15546034 2 days

http://www.tf2outpost.com/trade/15520518 3 days

http://www.tf2outpost.com/trade/15533425 3 days ( not bumped)

http://www.tf2outpost.com/trade/15498342 4 days

http://www.tf2outpost.com/trade/15503136 4 days

http://www.tf2outpost.com/trade/15509134 4 days

http://www.tf2outpost.com/trade/15511288 4 days

http://www.tf2outpost.com/trade/15503391 4 days (not bumped)

http://www.tf2outpost.com/trade/15498235 4 days (not bumped)

http://www.tf2outpost.com/trade/15511771 4 days (not bumped)

http://www.tf2outpost.com/trade/15507631 4 days (not bumped)

http://www.tf2outpost.com/trade/15486805 5 days (not bumped)

http://www.tf2outpost.com/trade/15481467 5 days (not bumped)

http://www.tf2outpost.com/trade/15459116 6 days

http://www.tf2outpost.com/trade/15425043 1 week

http://www.tf2outpost.com/trade/15365351 1 week

http://www.tf2outpost.com/trade/15428792 1 week

http://www.tf2outpost.com/trade/15433275 1 week (poorly bumped)

http://www.tf2outpost.com/trade/15406081 1 week (poorly bumped)

http://www.tf2outpost.com/trade/15428385 1 week (poorly bumped)

There are lot of unsold for 4 keys, hope i will get lot of critic and counter proof :D