As sale is over it's time to slowly bring back the old price. Current one is already outaded. Proof is below.~

Note: This is a conservative sugestion. ;d

1,3 keys = ~1 key + 2 ref

1,4 keys = ~1 key + 3 ref

1,5 keys = 1 key + 3,5 ref

1,6 keys = ~1 key + 4 ref

Quicksells:

http://www.tf2outpost.com/trade/17220123 - 1,3 keys - had one interested buyer in 6 mins -.-

http://www.tf2outpost.com/trade/17231273 - 1,3 keys sold without a bump

http://www.tf2outpost.com/trade/17228476 - 1,4 keys sold fast

http://www.tf2outpost.com/trade/17223103 - 1,4 keys sold in 3 hours

http://www.tf2outpost.com/trade/17222782 - 1,4 keys sold without a bump, not in bp

http://www.tf2outpost.com/trade/17219207 - 1,4 keys sold 2 cans fast, both not in bp

http://www.tf2outpost.com/trade/17200505 - 1,4 keys sold fast, not in bp

http://www.tf2outpost.com/trade/17198047 - 1,4 keys, had a willing buyer in few hours an seems to have sold for that much; check bp

http://www.tf2outpost.com/trade/17226708 - 1,5 keys sold 2 cans, both not in bp

http://www.tf2outpost.com/trade/17197517 - 1,5 keys sold 2 cans fast -> http://i.imgur.com/n5dCHTr.png

Solds:

http://www.tf2outpost.com/trade/17190275 - 1,6 keys sold 3-4 cans, none in bp

http://www.tf2outpost.com/trade/17220485 - ~1,9 keys sold

http://www.tf2outpost.com/trade/17217063 - 2 keys, not in bp

http://www.tf2outpost.com/trade/17213897 - 2 keys

http://www.tf2outpost.com/trade/17200842 - 2 keys in paints

Offers:

http://www.tf2outpost.com/trade/12228412 - Offered 2 keys in items

http://www.tf2outpost.com/trade/17214191 - Added for ~1,9 keys / Offered 1,6 keys

http://www.tf2outpost.com/trade/16693685 - Offered 1,5 keys

http://www.tf2outpost.com/trade/16545152 - Offered 1,5 keys

http://www.tf2outpost.com/trade/17210532 - Offered ~1,5 keys in items

http://www.tf2outpost.com/trade/16709539 - Offered 1,5+ keys in items

http://www.tf2outpost.com/trade/17229778 - Offered 1,4 keys

http://www.tf2outpost.com/trade/17161126 - Offered 1,4 keys, seller agreed to do 1,5 and now they're gone, i.e. quicksell

Buyers:

http://www.tf2outpost.com/trade/17214356 - 1,3 keys

http://www.tf2outpost.com/trade/17214669 - 1,4 keys

http://www.tf2outpost.com/trade/17212406 - 1,4 keys

http://www.tf2outpost.com/trade/17225435 - 1,5 keys

http://www.tf2outpost.com/trade/17233879 - Bought 3 for 6 keys (2 keys each)

http://www.tf2outpost.com/trade/17233229 - Selling a strange pomson for either 2 keys or white paint (2 in items)

Conclusion: Well, anything bellow 1,6 keys seems to sell fast. 2 key happens but not that much so I don't think it should be in the range YET. I mean I saw unsold white paints at 2 keys for days, so yea .. Many buyers, offers and quicksells bellow 1,6 keys, showing that below 1,6 keys is an obvious quicksell price. Again, going with a conservative suggestion as I don't have much proof above 1,6 keys. Feel free to add more, but price definitely needs a bump as current one is way too low. Not sure if my suggested price is low too, but I don't wanna rush the things.