I have a system that includes a pair of RT12s, CS250 for center, PSW300 and a pair of M5s in the rear. Problem is that we moved and now this system completely overpowers the smaller family room both acoustically and visually (per my boss) so I need to get a new set of (smaller) Polks - there is always an upside! How can I get an idea as to how much my present speakers are worth? I know how much I paid but how much can I reasonably expect to ask for them? Thanks for the help!!