Sellers below 3 keys:

http://backpack.tf/classifieds/search/453/1/0 ( http://imgur.com/iDIUksp )

-2 keys

http://www.tf2outpost.com/trade/10029515

-2 keys 1.33 ref ~ 2.29 keys

http://www.tf2outpost.com/trade/10088571

-2 keys 2 ref ~ 2.43 keys

http://www.tf2outpost.com/trade/10039677

-2 keys 2 ref ~ 2.43 keys

-Pink one for 3 keys (unsold for 3 days)

http://www.tf2outpost.com/trade/9616771

-2 keys 3 ref ~ 2.65 keys

Unsold @ 3 keys:

http://www.tf2outpost.com/trade/10107765

-1 day old

http://www.tf2outpost.com/trade/10098911

-1 day old

http://www.tf2outpost.com/trade/10081531

-2 days old

http://www.tf2outpost.com/trade/10027084

-3 days old

http://www.tf2outpost.com/trade/10012541

-4 days old

http://www.tf2outpost.com/trade/8747345

-1 month old

(Some of these unsold @ 3 keys are painted with low-high tier paints)

Buyers:

http://www.tf2outpost.com/trade/9096661

-Buying for 1 key 3 ref ~ 1.65 keys

-1 recent add

http://www.tf2outpost.com/trade/9961460

-Buying for 2 keys

-1 recent add

http://www.tf2outpost.com/trade/10070874

-Buying for 10 ref ~ 2.17 keys

-1 recent add)

http://www.tf2outpost.com/trade/8875038

-Buying for 2 keys 1 ref ~ 2.22 keys

-2 recent adds

Not enough 2 keys to support a 2-2.5 key range and there are many 2 key buyers suggesting that they resell for higher.