Don't know them at all, but I would take a much brighter view than darkbuddha. Paper, metal, wire and cabinets hold up just fine. Only thing that rots is foam surrounds which are easy and inexpensive to replace. Capacitors dry out over time and need to be replaced as well. Otherwise, speakers hold up great if they're not physically molested.
My main speakers are a pair of AR LST-2s from 1974. New foam on the woofers and new caps in the crossovers and they sound like new. Typically, it's not advised to chuck some new drivers in a cabinet. Cabinet and driver work together as a system and you'd have to get several orders of lucky (or do some research) to just land on a set up that is close to right.
Check em out and see how they look. I have weened myself from the thrift stores and craigslist, but used to buy all kinds of stereo gear. Speakers are usually not too difficult to put right if you know some basics and the voice coils aren't messed up.