<4 is a quicksell, it deserves more of a bump

http://www.tf2outpost.com/trade/17736183 - instasold for 3

http://www.tf2outpost.com/trade/17731233 - instasold for 3.3

http://www.tf2outpost.com/trade/17739426 - instasold for 3.4

http://www.tf2outpost.com/trade/17703330 - instasold for 3.6

http://www.tf2outpost.com/trade/17709615 - instasold for 3.6

http://www.tf2outpost.com/trade/17729962 - instasold for 3.6

^almost none of those were even bumped before being sold.

Buying for 3 keys:

http://www.tf2outpost.com/trade/17746302

http://www.tf2outpost.com/trade/17751086

http://www.tf2outpost.com/trade/17749382

http://www.tf2outpost.com/trade/17666505

None of them have any willing buyers, and the fact that there's quite a high competition within such a small market makes it obvious that 3 keys is a quicksell

Sold at 4 keys+:

http://www.tf2outpost.com/trade/17753495

http://www.tf2outpost.com/trade/17747521 - http://imgur.com/v1sXitP -thanks coma

http://www.tf2outpost.com/trade/17740421

http://www.tf2outpost.com/trade/17736346

http://www.tf2outpost.com/trade/17735161

http://www.tf2outpost.com/trade/17398647 - one was also sold for 4.3

Even it seems as if 4 itself was a qs

Only 2 pages on outpost, currently cheapest on classifieds is 4, no support to include <4 in range.