Several good sellers on eBay are campus111, pig-pony, and tinydealdirect. The first two also have websites of their own,
www.campus111.com and
www.pigpony.com. Their players are genuine to their stated capacity, and even though their shipping takes awhile (longest for me was almost a month), you'll be satisfied when you finally receive the players. Also is Uxcell, a reputable company of these players. There are links to them all over the site and although I have never bought from them, they are supposed to be good. Hope I've helped.