I realise that is has currently gone up, but as of looking at outpost now, a lot have been selling for under the suggested price. I believe that the range should be set down one notch to match this. Links below are proof:

Selling: http://www.tf2outpost.com/trade/22410849 - 3.66 each

Sold (to me): http://www.tf2outpost.com/trade/22785082 - 3.77 each

Selling: http://www.tf2outpost.com/trade/19355307 - 3.88 each

Selling: http://www.tf2outpost.com/trade/22953844 - 3.88 each

Selling: http://www.tf2outpost.com/trade/22945793 - 3.88 each

Selling: http://www.tf2outpost.com/trade/22978095 - 3.88 each

Selling: http://www.tf2outpost.com/trade/22784689 - 3.88 each

Selling: http://www.tf2outpost.com/trade/22976894 - 3.88 each

So though a lot are selling / sold for 3.88, there are ones for cheaper. I believe the price range should be set down from 4 to 3.88 as a lot are selling for 3.88 so why the need to be higher?