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 2.73(2.75) Keys - http://i.imgur.com/Sj8ZsJE.png

Unsold for 12 days http://backpack.tf/item/3330359710

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x2 for sale at 2.88(2.9) Keys - http://i.imgur.com/2wz4CtM.png

Unsold for 1 month http://backpack.tf/item/3342071012

Unsold for 7 days(Tinge paint+Parts Attached) http://backpack.tf/item/3423771757