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).

x2 for sale at 7.33 Refined - http://i.imgur.com/FCiwJr2.png

Unsold for 3 days http://backpack.tf/item/1250077616

Unsold for 3 days http://backpack.tf/item/1192994496

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x1 for sale at 7.55 Refined - http://i.imgur.com/s59RY2x.png

Unsold for 4 days http://backpack.tf/item/1228001287