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 4.15 Keys - http://i.imgur.com/6hf4Pgp.png

Unsold for 2 days http://backpack.tf/item/346791484

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x1 for sale at 4.3 Keys - http://i.imgur.com/i2fS9OU.png

Unsold for 2 days(Purple paint) http://backpack.tf/item/346913659

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x1 for sale at 4.4 Keys - http://i.imgur.com/Yc8r8V4.png

Unsold for 12 hours(Hue paint) http://backpack.tf/item/353392667

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x2 for sale at 4.45 Keys - http://i.imgur.com/cPkvTLF.png

Unsold for 1 day(Tinge paint) http://backpack.tf/item/361818044

Unsold for 2 days(216-190-216 paint) http://backpack.tf/item/602550183

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x3 for sale at 4.5 Keys - http://i.imgur.com/GpeOz1R.png

Unsold for 5 days(Violet paint) http://backpack.tf/item/347136271

Unsold for 5 days(Purple paint) http://backpack.tf/item/351131710

Unsold for 7 days(Tinge paint) http://backpack.tf/item/361928372

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x2 for sale at 4.6 Keys - http://i.imgur.com/dkoeXIk.png

Unsold for 17 days http://backpack.tf/item/362804489

Unsold for 17 days http://backpack.tf/item/349503689

Outpost sellers below X

http://www.tf2outpost.com/trade/28436180 - 4.5 Keys - Unsold for 4 days - Violet paint.

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