Help selecting the right category(s)?

Hi, I'm trying to submit my site following the dmoz.org guidelines and am new at this. The site is www.sonicswap.com. It is a site where members can swap/trade used music, movies and games. I have found 3 categories that appear equally viable. Am I allowed to submit to just one category, all three or is there a more broadly defined category that fits better?

http://www.dmoz.org/Shopping/Entertainment/Recordings/Music/Used/
http://www.dmoz.org/Shopping/Entertainment/Recordings/Video/Used/
http://www.dmoz.org/Shopping/Toys_and_Games/Games/Video_Games/Used/

thanks,
jay

Submit to just one. A broadly based category is better.

Submit to the best one you can find. We help ALL submitted websites find the best category.