Classifieds at the time of posting this suggestion.

The age of the listing(s) are shown in the screenshot(s) rather than the last bump.

Unsolds and item histories are presented in chronological order according to the screenshot(s).

x1 for sale at 2.4 Keys - http://i.imgur.com/mDYKxW1.png

Unsold for 8 days http://backpack.tf/item/2053452856

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x1 for sale at 2.5 Keys - http://i.imgur.com/caJj5fQ.png

Unsold for 5 days(Duplicated) http://backpack.tf/item/2073212028

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x1 for sale at 2.55 Keys - http://i.imgur.com/m0ENJ3M.png

Unsold for 21 days http://backpack.tf/item/2038179783

Outpost sellers.

http://www.tf2outpost.com/trade/28451759 - 2.4 Keys - Unsold for 2 weeks - Autobumper.

Everything else on Outpost is Collectors Levels, Paints, Sets or Spells.

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