It used to be primarily Sony, but I've sold them all a long time ago, which kind of pains me considering how much most Sony WM's go for now and days. Now I'm just interested in Panasonic and Sanyo portable cassette players. Also a soft spot for the Citizen CBM-777. I went from a large collection to a few specific tastes. As for vinyl, I like to collect future funk and video game OST records and despite what most collectors do with those genres, I actually like to play them.
I had to look up VG OST, interesting hobby, I've never run across one of those records unless Pac Man Fever counts. I feel like Florida would be like Greece and have a ton of vintage equipment, the culture and sunshine makes it a perfect place for portables. Let us know if you find anything good.