Proof in the comments! This needs an update. I've been constantly watching these trades that are open on OP since I love this paint, and I've noticed that 2.66 just doesn't occur anymore.

OUTPOST - Sellers Currently 4 trades.

http://www.tf2outpost.com/trade/8022709

Offers:

http://puu.sh/1Z9SN - injustice is about .33, so offered 3 ref

http://puu.sh/1Z9Qm - rejected 1k 1r

http://puu.sh/1Z9Re - offered 2 keys for 3, no answer yet (2.66 ref per)

http://www.tf2outpost.com/trade/3522677 - he is out of stock, but offers are still being made.

Offers:

http://puu.sh/1Z9Up - offered 1 key

http://puu.sh/1Z9WW - offered 1 key 3 months ago

http://www.tf2outpost.com/trade/4470187 - also out of stock

Offers:

http://puu.sh/1Za2j - offered 1 key 2 months ago

http://www.tf2outpost.com/trade/8470721

Offers:

http://puu.sh/1Za3Z - offered 1 key, was rejected

http://puu.sh/1Za4k - offered 3 ref, no response yet

Granted some of the older 1 keys offers I didn't account for inflation of the ref. But there are still new offers of that value even with keys even at 3.whatever ref.

OUTPOST - Buyers Currently a lot of them.

http://www.tf2outpost.com/trade/8428097 - 1 key, 3 days old, bought 1 (supposedly)

http://www.tf2outpost.com/trade/8480237 - 3.00 ref, new trade

http://www.tf2outpost.com/trade/8386317 - 3.00 ref, 4 days, no bites.

http://www.tf2outpost.com/trade/8212069 - 2.88 ref, no bites

http://www.tf2outpost.com/trade/7623044 - 2.66 ref, my sorry ass, no hits

There is no one, as of now, selling it in the classifieds either. This is a very limited items with a relatively large demand.

Conclusion

It doesn't seem like 3 ref is even cutting it anymore. There are multiple buyers and offers at 3 ref with no bites. With a pretty limited market and a relatively high demand it's clear that people want this paint, and will pay considerably more for it offers.

Suggested price: 1 - 1.5 keys.

Thanks. I love this paint, so if you have any, I'll buy some! :D