$0 IMO. Why would you buy such a domain? Because it looks almost like "best"? It's really just almost. Good luck.
lol it's funny that you have 0ak.com in your sig, but thanks anyway. I'm pretty sure it's worth more than that.
Anyone who is looking to buy brandable short domain might be interested I would guess low to mid XX$ if you find someone who is in very much need of this domain then you could get higher too.