The swirls are the result of the top protective layer getting damaged/chipped likely during installation. That allowed the aluminum underneath to oxidize. You can blame the shop that mounted the tires. And this is why you shouldn't use aluminum/magnesium wheels in the winter.
Good luck with sale. I think the low interest is due to the low tread depth. Maybe 1 season left on them. I have a set of Nokian Hakkapellita RSi right now, with 4 seasons on them, and they have more tread depth than these.