Epos ELS-3 is a multiple award-winner and a true gem in your price range.
Ebay can be great, or not so much. Depends on who you're doing business with. Same with Audiogon, which has a much better selection. With older stuff, you have no idea what you're buying and probably neither does the seller. Something that works great today but has 20 years of service probably is a ticking bomb. Promises of "works perfectly" and "mint condition" are thrown around casually (and innocently) and might not be indicative of the future.
In general, I'm against mainstream Japanese speakers. This is a personal bias, based on my experience only, which is that I've never heard a pair that sounded any good.
Have fun!