I had not done an eBay search for "sold" items until now, some people seem to be paying high prices for Atari Falcon systems. I have a SPARC Station 2, Ultra 1

I had not done an eBay search for "sold" items until now, some people seem to be paying high prices for Atari Falcon systems. I have a SPARC Station 2, Ultra 1, Ultra 2 and a Macintosh Quadra 950 that all work and would maybe have resale value if I wanted to get rid of them.