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 5.78(5.8) Keys - http://i.imgur.com/DawJbt3.png

Unsold for 2 days http://backpack.tf/item/1343239514

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x2 for sale at 5.85 Keys - http://i.imgur.com/cy95vOv.png

Unsold for 3 days http://backpack.tf/item/1348017785

Unsold for 5 days http://backpack.tf/item/1365380892

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x1 for sale at 5.88(5.9) Keys - http://i.imgur.com/yQNeczK.png

Unsold for 10 days(Killstreak+Parts Attached) http://backpack.tf/item/1353615410

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x1 for sale at 5.93(5.95) Keys - http://i.imgur.com/aZyTAWb.png

Unsold for 3 days(Parts Attached) http://backpack.tf/item/1336383856

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x8 for sale at 6 Keys - http://i.imgur.com/yMt75PQ.png - http://i.imgur.com/xOGsJZY.png

Unsold for 8 days http://backpack.tf/item/1355206534

Unsold for 8 days(Parts Attached) http://backpack.tf/item/1361329529

Unsold for 2 days(Specialized Killstreak+Parts Attached) http://backpack.tf/item/1371744971

Unsold for 7 days(Killstreak) http://backpack.tf/item/1372294944

Unsold for 10 days http://backpack.tf/item/1330417708

Unsold for 3 days(Specialized Killstreak) http://backpack.tf/item/1355257653

Unsold for 7 days(Specialized Killstreak) http://backpack.tf/item/1330843867

Unsold for 3 days(Specialized Killstreak) http://backpack.tf/item/1348779706

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x1 for sale at 6.05 Keys - http://i.imgur.com/swGtTUm.png

Unsold for 14 days http://backpack.tf/item/1330730821

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x2 for sale at 6.15 Keys - http://i.imgur.com/abIK4S5.png

Unsold for 1 month(Duplicated) http://backpack.tf/item/1340529769

Unsold for 1 month http://backpack.tf/item/1354278370

Outpost sellers.

http://www.tf2outpost.com/trade/28443968 - 6 Keys - Young - Specialized Killstreak+Parts Attached.

http://www.tf2outpost.com/trade/28433138 - 6 Keys - Unsold for 5 days - Specialized Killstreak.

http://www.tf2outpost.com/trade/28382457 - 6 Keys - Unsold for 3 weeks - Killstreak.

http://www.tf2outpost.com/trade/28398209 - 6.15 Keys - Unsold for 2 weeks.

http://www.tf2outpost.com/trade/28385850 - 6.2 Keys - Unsold for 3 weeks - Specialized Killstreak+Parts Attached.

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