500 people?
Unless its a tourism hotspot, then its worthless. Just think what the 500 people are worth to any advertiser? How many people would even be online among the 500?
IMO, if you want to reg such geo domains, I suggest you get a list of all geo names from South/North Dakota, Washington, then check them. The last time I checked, there were many towns with population >3000 still available to reg