I just came across this add on Craiglist. http://louisville.craigslist.org/ele/783906428.html
What do you think they could be? I am thinking maybe later M7's. But I really have no clue without pictures.
The ad is only seven days old so what ever they are they might still have them.
I sent the seller a email asking for a pic and if there was a model number on the back.
Maybe I'll score some vintage polks for a buck!!.:)