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 3 Keys - http://i.imgur.com/k1PJL7N.png

Unsold for 20 hours http://backpack.tf/item/2039668883

Unsold for 5 days http://backpack.tf/item/2037157928

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x1 for sale at 3.21 Keys(3.2) - http://i.imgur.com/lhgJUzd.png

Unsold for 1 day http://backpack.tf/item/2055368197

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x1 for sale at 3.26 Keys(3.25) - http://i.imgur.com/PvGbXrv.png

Unsold for 6 days http://backpack.tf/item/2067084909

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x5 for sale at 3.37 Keys(3.4) - http://i.imgur.com/kkf0MOC.png

Unsold for 10 days http://backpack.tf/item/2037698346

Unsold for 11 days http://backpack.tf/item/2045342587

Unsold for 19 days http://backpack.tf/item/2061132614

Unsold for 29 days http://backpack.tf/item/2050047975

Unsold for 29 days http://backpack.tf/item/2073098202

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x1 for sale at 3.4 Keys - http://i.imgur.com/wvFqoz6.png

Unsold for 1 month http://backpack.tf/item/2035816438

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x1 for sale at 3.42 Keys(3.4) - http://i.imgur.com/DpTpWjk.png

Unsold for 12 hours http://backpack.tf/item/2035739919

Outpost sellers below 3.4 Keys

http://www.tf2outpost.com/trade/28334020 - 3 Keys - Unsold for 1 week.

Outpost unsolds at 3.4 Keys

http://www.tf2outpost.com/trade/28331988 - 3.4 Keys - Unsold for 1 week.

http://www.tf2outpost.com/trade/28326532 - 3 Keys+ 8 Refined, 3.42 Keys(3.4) - Unsold for 1 week.

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