Classifieds at the time of posting this suggestion.

Unsolds are based on how long the listing has been up; Listing has been up 5 days and item been in the sellers inventory for 8 days? It has been unsold for 5 days.

The age of the listing(s) are shown in the screenshots rather than the last bump - Unsolds and item histories are presented in chronological order according to the screenshot(s).

x10 for sale at 5 Refined - http://i.imgur.com/QJ9zN6f.png

Unsold for ~1 day http://backpack.tf/item/4957970490

The following are from the same seller and have all been unsold for 1 day:

http://backpack.tf/item/5033825600

http://backpack.tf/item/5035864343

http://backpack.tf/item/1661881331

http://backpack.tf/item/4989340571

http://backpack.tf/item/5018592362

http://backpack.tf/item/5017791792

http://backpack.tf/item/5017748109

http://backpack.tf/item/5017791368

http://backpack.tf/item/4989400625

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x3 for sale at 6 Refined - http://i.imgur.com/frRn7qi.png

Unsold for 4 days http://backpack.tf/item/4961575408

Unsold for 1 hour http://backpack.tf/item/1833181172

Unsold for 1 day http://backpack.tf/item/1650082670

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x1 for sale at 6.22 Refined - http://i.imgur.com/ITLna52.png

Unsold for 1 day http://backpack.tf/item/1667608512

-

x8 or sale at 6.66 Refined - http://i.imgur.com/yv7VG6Q.png - http://i.imgur.com/l04uYu2.png

Unsold for 19 days http://backpack.tf/item/4079493665

Unsold for 6 days http://backpack.tf/item/5038964164

Unsold for 6 days http://backpack.tf/item/5023724848

Unsold for 6 days http://backpack.tf/item/5011236940

Unsold for 6 days http://backpack.tf/item/4952821670

Unsold for 10 hours http://backpack.tf/item/5018532516

Unsold for 1 day http://backpack.tf/item/5037785758

Unsold for 5 days http://backpack.tf/item/5029211448

Outpost sellers.

http://www.tf2outpost.com/trade/28445434 - 6 Refined - Young.

http://www.tf2outpost.com/trade/28437306 - 6 Refined - Unsold for 3 days.

http://www.tf2outpost.com/trade/28352309 - 6.33 Refined - Unsold for 1 month - Autobumper.

I am excluding all trades on Outpost that haven't been bumped for 1 day or more.