Yeah, it's a bad deal. No matter what you're told, go google it. Look it up, the whole set.. five speakers, sold for less then $500 in 2000... nine years ago. They sold with a sub for less then $700. I'm sorry, but you can't get 75% of full value 9 years later.
http://www.dealtime.com/xPO-Infinity-SM-165
(look at when the reviews are from)
While I generally hate packages, you can go buy a full package for less the $500 that would be infinitely better (pun intended) and -brand new-
http://www.onecall.com/ProductDetails.aspx?id=93080
As an example. Just look for it, and pay attention to what you're buying. Buying anything that has to have been used for the last nine years as an audio product at a fair price.. is hard to justify.