About $100 for a reseller I think. K is a semi premium name, but the others are good.
BUT you could think of selling it to the Norwegian market NKR (Norw Krone) is their national currency, and it would be perfect for a Norwegian curerency exchange site. But that is a tough mission. Although, in this case, .biz is even a good gtld (otherwise I do not like it at all).
Try with Norway, and look for low-mid $xxx for it.
Good luck,
Alex Simon