Going for my 10th price suggestion... I'm getting the hang of this. :P

Classifieds at time of posting:

1.76 keys x 2

1.8 keys x 1

1.87 keys x 8

Unsolds @ ~2 keys:

http://www.tf2outpost.com/trade/23229505 (6 days, 1.85)

http://www.tf2outpost.com/trade/23260889 (4 days, 1.9)

http://www.tf2outpost.com/trade/23063517 (2 weeks, 1.9 since 18 ref isn't 2 keys anymore)

http://www.tf2outpost.com/trade/23218577 (6 days)

http://www.tf2outpost.com/trade/23118811 (1 week)

http://www.tf2outpost.com/trade/23260211 (4 days)

http://www.tf2outpost.com/trade/23266813 (3 days)

http://www.tf2outpost.com/trade/23267828 (3 days)

http://www.tf2outpost.com/trade/23260548 (4 days)

http://www.tf2outpost.com/trade/23151261 (1 week)

http://www.tf2outpost.com/trade/23161952 (1 week, says "price is going up" xD)

http://www.tf2outpost.com/trade/23231697 (6 days)

Sellers @ 1.8-1.9 keys:

http://www.tf2outpost.com/trade/22834654 (weird trade, sells for 1.5, 4 weeks but had higher price, gets offers but doesn't accept them)

http://www.tf2outpost.com/trade/23312438 (1.7)

http://www.tf2outpost.com/trade/23300167 (1.7)

http://www.tf2outpost.com/trade/23300081 (1.7)

http://www.tf2outpost.com/trade/23169154 (1.7)

http://www.tf2outpost.com/trade/23303195 (1.75? 16 ref)

http://www.tf2outpost.com/trade/23324201 (1.8, young)

http://www.tf2outpost.com/trade/23325512 (1.8, young)

http://www.tf2outpost.com/trade/23129319 (1.8)

http://www.tf2outpost.com/trade/23292903 (1.8)

http://www.tf2outpost.com/trade/23305732 (1.8)

http://www.tf2outpost.com/trade/23190348 (1.8)