1. Second suggestion, advice/feedback/crticism would be appreciated.

2. Sorry for the lack of evidence, this was about as much as I could find.

Firstly, take a look at classfieds.

http://backpack.tf/classifieds/search/id/520a01bf4bd7b8c631000006

Out of 13 non strange-parted pomsons,

1 x 6keys

2 x 6.5 keys (1 day unsold and 4 day unsold)

2 x 7 keys (6 DAY unsold and 5 hours unsold)

3 x 7.5 keys (2 x 3day unsold and 1 6 day unsold)

Not gonna care about the rest cause they are never gonna be sold anytime soon.

Selling (Unsold) at 6 keys (Selling=Sold):

http://www.tf2outpost.com/trade/14473658 - 2 hours

http://www.tf2outpost.com/trade/14471311 - 8 hours

http://www.tf2outpost.com/trade/14471051 - 6 hours

http://www.tf2outpost.com/trade/14454827 - 1 day

http://www.tf2outpost.com/trade/14422807 - 2 days

Sold at 6 keys

http://www.tf2outpost.com/trade/14443131 - 1 day

http://www.tf2outpost.com/trade/14441685 - 22 hours

Unsolds at 6.5 keys:

http://www.tf2outpost.com/trade/14408523 - 3 days

Unsolds at 7 keys:

http://www.tf2outpost.com/trade/14439885 - 1 day (heavily bumped)

http://www.tf2outpost.com/trade/14457107 - 1 day (heavily bumped)

http://www.tf2outpost.com/trade/14467285 - 22 hours

http://www.tf2outpost.com/trade/14453437 - 1 day

http://www.tf2outpost.com/trade/14392102 - 3 days

http://www.tf2outpost.com/trade/14407102 - 3 days

http://www.tf2outpost.com/trade/14378777 - 4 days

http://www.tf2outpost.com/trade/14403413 - 3 days

http://www.tf2outpost.com/trade/14424315 - 2 days

http://www.tf2outpost.com/trade/14380682 - 4 days

(I admit, it seems to me that most of these trades arent really bumped that often)

Once again, sorry for the lack of evidence but there really isnt much to work with out there.