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 2.83(2.85) Keys - http://i.imgur.com/yuCv5Et.png

Unsold for 2 days http://backpack.tf/item/2402661958

Unsold for 5 days http://backpack.tf/item/5032375585

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x1 for sale at 2.88(2.9) Keys - http://i.imgur.com/vo751IZ.png

Unsold for 9 days http://backpack.tf/item/4985697039

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x3 for sale at 3 Keys - http://i.imgur.com/n3Je4oT.png

Unsold for 1 month http://backpack.tf/item/2349706922

Unsold for 20 days(Zepheniah's paint) http://backpack.tf/item/2363692482

Unsold for 7 days http://backpack.tf/item/2612544517