The AR-MST is, I believe, the rarest of the original AR speakers (1-5 series, LST, LSTII, MST).
I've never really had an overwhelming urge to own a pair, but they're up for sale, factory sealed, on ebay right now.
No affiliation, very little time left on the auction.
http://cgi.ebay.com/vintage-AR-Acouctic-Research-speakers_W0QQitemZ110186817502QQihZ001QQcategoryZ50597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I've never really had an overwhelming urge to own a pair, but they're up for sale, factory sealed, on ebay right now.
No affiliation, very little time left on the auction.
http://cgi.ebay.com/vintage-AR-Acouctic-Research-speakers_W0QQitemZ110186817502QQihZ001QQcategoryZ50597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
