True for things like games you may not care, but for furniture, cars, and personals you probably do care.
I think we will probably just show a map in the future and you can pick which region/town you in from there.
I want the closest piano stool. I live in East London; some parts of Essex are closer to me than some parts of London.
Currently you have people selecting a region and THEN selecting what they want. It would be better to have people select what they want and THEN select how important the proximity is.
That solves (i) The arbitrary city/region issue and (ii) Lets you advertise on the home page the scope of what people can shop for, rather than advertising all the cities in a country.