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).

x1 for sale at 0.33 Refined - http://i.imgur.com/rbeD7vP.png

Unsold for 5 days http://backpack.tf/item/2078434703

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x1 for sale at 0.44 Refined - http://i.imgur.com/hwhtQmc.png

Unsold for 5 days http://backpack.tf/item/1201175395

Outpost sellers.

http://www.tf2outpost.com/trade/28267258 - 0.66 Refined - Unsold for 1 month.

http://www.tf2outpost.com/trade/28256076 - 0.66 Refined - Unsold for 1 month.