Thanks for the replies. JLange2010--they are the walnut cabinet original large Advents (so they aren't bullnosed or utility). As far as condition goes, all I know is that they are 100% original, have never been worked on, and need a refoam. Z0mb1e84--I actually did look at eBay prices, and the model I'm looking at tends to sell anywhere from $100-$400 (I'm looking at completed listings). Of course, that makes me wonder if there is something wrong with these speakers! The thing is that I'm about an hour drive away from the seller, and I don't really want to make the trip if it isn't worth it.
I'm not exactly new to the world of vintage speakers since I'm vintage myself (JLange2010--when I was in college, everyone I knew had a Pioneer receiver and a pair of Advents, so I definitely understand the nostalgia aspect), but I've only had one recent experience of buying vintage speakers. And that was a no-brainer--I found a pair of Wharfedale E-90s at a flea market for $10. So, could any of you give me a little advice on what to look and listen for if I do go down to look at these speakers? How do you know if the woofer is bad or the tweeter blown? How can I spot potential crossover issues? Any advice would certainly be appreciated. Thanks!