One thing I would want to know is how old are the panels on them? If they are 15 years old or more then they probably need new panels. Not sure how much they are, but my Prodigies were about $2800. So if buying them, make sure the price is fair because youll probably want to order new panels as soon as you get them. There is a chance they might have been replaced a time or two, and then you could be golden. The panels have a serial number on them that you can decode and it tells you when they were made. There is a webpage on here somewhere that tells you how to decode it. Maybe someone can post it. I lost the link.