Classifieds at the time of posting this suggestion.

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 1.45 Keys - http://i.imgur.com/U5hJkHH.png

Unsold for 3 days http://backpack.tf/item/5038874297

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x1 for sale at 1.5 Keys - http://i.imgur.com/Gc023Uh.png

Unsold for 5 days http://backpack.tf/item/5022239183

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x2 for sale at 1.65 Keys - http://i.imgur.com/CipaxO1.png

Unsold for 10 days http://backpack.tf/item/4969502189

Unsold for 10 days http://backpack.tf/item/4960868336

1.45 Key listing never been bumped and buyer been offline since the creation of said listing.