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.

x2 for sale at 2 Keys - http://i.imgur.com/90zbtHr.png

Unsold for ~1 day http://backpack.tf/item/4958817487

Unsold for 4 hours http://backpack.tf/item/4954318137

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x6 for sale at 2.04-2.06 Keys(2.05 Keys) - http://i.imgur.com/OblquAn.png

Unsold for 6 hours http://backpack.tf/item/4956191983

Unsold for 13 hours http://backpack.tf/item/4955485272

Unsold for 16 hours http://backpack.tf/item/4956885222

Unsold for 21 hours http://backpack.tf/item/4952830186

Unsold for 1 hour http://backpack.tf/item/4954657539

Unsold for 7 hours http://backpack.tf/item/4963991279

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x1 for sale at 2.07 Keys(2.1 Keys) - http://i.imgur.com/eWXRUhz.png

Unsold for 17 hours http://backpack.tf/item/4960041652

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x1 for sale at 2.17 Keys(2.2 Keys) - http://i.imgur.com/eh4CEMv.png

Unsold for 2 days http://backpack.tf/item/4954490511

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x1 for sale at 2.22 Keys(2.2 Keys) - http://i.imgur.com/90v8Ovl.png

Unsold for 8 hours http://backpack.tf/item/4959392803

Outpost sellers below 2.5 Keys

http://www.tf2outpost.com/trade/28351502 - 2 Keys.

http://www.tf2outpost.com/trade/28351500 - 2 Keys.

http://www.tf2outpost.com/trade/28350353 - 2 Keys - Selling 3.

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http://www.tf2outpost.com/trade/28350924 - 2 Keys 1 Refined.

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http://www.tf2outpost.com/trade/28349662 - 2 Keys 1.22 Refined.

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http://www.tf2outpost.com/trade/28342812 - 2 Keys 5 Refined - Selling 2 > http://www.tf2outpost.com/trade/28350179

Outpost unsolds at 2.5 Keys

http://www.tf2outpost.com/trade/28351406 - 2.5 Keys - Young.

I am excluding all sellers/buyers with their price as "bp.tf price" as the item has a flexible price making it an unclear price.

Current buyers support that 2 keys is not a quicksell/buy price - http://i.imgur.com/10Pu3kG.png

Unsolds support that the current price is too high, the amount of sellers at 2 keys support that it's neither too low nor a quicksell/buy price.