I'm about to buy a carbon black/cinnamon 03 M3 convertible SMG with 28k miles ... the car has the 19" factory rims, and it's a certified car, so the tires are either new or in great shape. I live in Boston, so I don't really want to deal with the 19s because I'll be putting snows on in the winter and I live in a condo with no place to store the extra set. I don't know if I can swap with someone who has 18s and wants 19s, or if I should just put them up for sale, any insight? What are these things worth? Thanks!

im pretty sure someone would want to do an outright swap, problem might be finding someone local