Yeah buying used is always a risk. However, even on ebay there are online retailers, like Music 123 that offer 30 day returns and the like. Also, buying from Guitar Center used is pretty fantastic- you have their nationwide inventory to choose from, they'll ship it direct to your house or the nearest GC, PLUS a 45 day return! And if you don't like it, you don't have to ship it back, just return it to a local store. They're the first ones I check out. Unfortunately I tried to buy a PSR EW 400 ($150!), but even after placing the order I was informed someone else bought it, turns out its not entirely uncommon for two buyers to be after the same purchase.
Yeah, buying older boards carries a bigger risk, which is why I would think its generally safer to get a higher end board, probably better made in the first place. Which is why I was asking for recommendations.
I checked out your for sale section on this forum- it's close to 90% for Tyros, Genos and s9xx boards!