2 month old price, 32 in the wild, like 10 or 11 on outpost atm.

http://backpack.tf/unusuals/600/Your_Worst_Nightmare for reference

Trades:

http://www.tf2outpost.com/trade/9337959 - b/o 2 buds

No offers yet

http://www.tf2outpost.com/trade/9223612

-Flies yellow belt (~2.8(!))

http://www.tf2outpost.com/trade/8902760 - b/o 2 buds

-1 bud, an Indubitably Green BMOC, and 3 keys (~1.6)

-Stormy Storm Marauder (~1.7)

-Smoking triboniophorus tyrannus (~1.3)

http://www.tf2outpost.com/trade/8776452

-Stormy storm Snaggletooth (~1.8)

-Stormy Storm Marauder (~1.7)

-1 bud + 12 keys

So with 2 that have 2 bud b/os and multiple refused offers in the 1.5-1.7 range, it looks like this range (1.7-2 buds) is reasonable and fair to buyers and sellers.