I think using Overture is not the best way to value a domain, unless maybe it is w/extension. Any amount of overture results doesn't guarantee any traffic for the particular domain.
As I said I am not sure of value for this type of city domain, based in a country like Iran. I do not see a big Iranian presence on the internet although there are alot of overture searches. I wouldn't place alot of reseller value on this type of domain. Might be worth alot to the right end user.