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).

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

Unsold for 1 day http://backpack.tf/item/1337488307

Unsold for 2 hours http://backpack.tf/item/1337212419

Unsold for 3 days http://backpack.tf/item/1350094127

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x4 for sale at 4.7 Keys - http://i.imgur.com/ki9i2yz.png

Unsold for 3 days http://backpack.tf/item/1336246882

Unsold for 1 day http://backpack.tf/item/1352458676

Unsold for 1 day(Parts Attached) http://backpack.tf/item/1369619893

Unsold for 13 hours(Parts Attached) http://backpack.tf/item/1353071552

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x1 for sale at 4.75 Keys - http://i.imgur.com/BQhgwTh.png

Unsold for 13 days http://backpack.tf/item/1334244244

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x2 for sale at 4.8 Keys - http://i.imgur.com/wI3M9rz.png

Unsold for 16 days http://backpack.tf/item/1352128658

Unsold for 17 days http://backpack.tf/item/1372240300

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x6 for sale at 5 Keys - http://i.imgur.com/GKeGcD2.png

Unsold for 28 days http://backpack.tf/item/1330460428

Unsold for 1 hour http://backpack.tf/item/1333779349

Unsold for 5 days http://backpack.tf/item/1346143879

Unsold for 11 days http://backpack.tf/item/1337593325

Unsold for 3 days(Parts Attached) http://backpack.tf/item/1367784693

Unsold for 21 days http://backpack.tf/item/1349565497

Outpost sellers.

http://www.tf2outpost.com/trade/28483533 - 4.8 Keys - Unsold for 1 day - Parts Attached.

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http://www.tf2outpost.com/trade/28433138 - 4.9 Keys - Unsold for 3 weeks - Autobumper.

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http://www.tf2outpost.com/trade/28483269 - 5 Keys - Unsold for 1 day - Item history gives the illusion that it's sold, but it's not, it is duplicated.

http://www.tf2outpost.com/trade/28461929 - 5 Keys - Unsold for 1 week.

http://www.tf2outpost.com/trade/28447523 - 5 Keys - Unsold for 2 weeks - Autobumper.

http://www.tf2outpost.com/trade/28370624 - 5 Keys - Unsold for 1 month.

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

http://i.imgur.com/RK9FQnF.png

Still 3 sellers at 4.5.