http://backpack.tf/classifieds/search/id/52857fe24dd7b89f0e8b4567 (1 at 2.35, lots at 2.5, 1 at 2.6, lots at 3)

Proof:

Unsolds:

3 keys:

http://www.tf2outpost.com/trade/16091887 (1 day)

http://www.tf2outpost.com/trade/16110665 (<1 day)

http://www.tf2outpost.com/trade/16111230 (<1 day)

http://www.tf2outpost.com/trade/15987287 (5 days)

http://www.tf2outpost.com/trade/15932943 (1 week)

http://www.tf2outpost.com/trade/15838557 (1 week)

http://www.tf2outpost.com/trade/16117416 (<1 day)

http://www.tf2outpost.com/trade/16047882 (2 days)

http://www.tf2outpost.com/trade/16010015 (4 days, Purple)

http://www.tf2outpost.com/trade/15914338 (1 week)

http://www.tf2outpost.com/trade/16060773 (2 days)

http://www.tf2outpost.com/trade/16060099 (2 days)

http://www.tf2outpost.com/trade/15839696 (1 week)

http://www.tf2outpost.com/trade/15947343 (1 week)

http://www.tf2outpost.com/trade/16055215 (2 days)

http://www.tf2outpost.com/trade/15884864 (1 week)

http://www.tf2outpost.com/trade/15939592 (1 week)

2.8 keys:

http://www.tf2outpost.com/trade/16108371 (<1 day)

2.66 keys:

http://www.tf2outpost.com/trade/16012508 (4 days)

http://www.tf2outpost.com/trade/16103913 (<1 day)

http://www.tf2outpost.com/trade/16080415 (1 day)

Selling:

2.5 keys:

http://www.tf2outpost.com/trade/16097186 (<1 day)

http://www.tf2outpost.com/trade/16118994 (<1 day)

http://www.tf2outpost.com/trade/16114616 (<1 day)

http://www.tf2outpost.com/trade/16055538 (2 days)

http://www.tf2outpost.com/trade/16049639 (2 days)

2.33 keys:

http://www.tf2outpost.com/trade/16119371 (<1 day)

1.33 keys:

http://www.tf2outpost.com/trade/16102727 (<1 day)

1 key:

http://www.tf2outpost.com/trade/16069049 (1 day)

3 keys just isn't selling anymore. 2.66 is rare but still occurs. Range of 2.5-2.66 keys will be fine.

Thanks for voting : )