Picked up a pair of these used on eBay for $200 several years ago. I have them mounted in my kitchen "entertainment" wall, flanking a 60" TV (hey, why not? We spend most of our time in the kitchen). I also have a HSU STF-1 sub inside a lower cabinet ($100 used), and a Denon AVR-4800 (again, $100 used) driving them. The combination sounds ridiculously good for the money. Not the last word in detail, but I find their non-aggressive nature perfect for overall listenability. I often have metal YouTube videos going while doing housework, and it's never annoying at louder listening levels. Visitors always comment on how good these in-walls sound. The big, older Denon has no trouble driving them. Being an enclosed, cast enclosure, the sound doesn't bleed into the room behind them. Highly recommended.

None at this price point (or even above) on the used market. Just buy from a reputable seller with good feedback.