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 16.66 Refined - http://i.imgur.com/VWGOUUM.png

Unsold for 2 days http://backpack.tf/item/1537545365

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x2 for sale at 17 Refined - http://i.imgur.com/p03bvAl.png

Unsold for 24 minutes http://backpack.tf/item/4898585714

Unsold for 1 day http://backpack.tf/item/407952314

Outpost sellers.

http://www.tf2outpost.com/trade/28443675 - 17 Refined - Young.

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Everything else on Outpost is priced higher due to Killstreaks or them being Strange quality.

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