As some may have noted from my other thread, I'm in the process of trying to find parts for a B&O speaker.  In case it's not been mentioned here in the past, this is a pretty useful site that compiles all craigslist and eBay search results in one place.  If you type in Bang & Olufsen there are currently around 173 postings.  Some are out of date but most are currrent.

http://www.jaxed.com/cgi-bin/sd.cgi?cat=ele

If this link doesn't work go to jaxed.com and click around until you get to the "Mash" page.  It was set up originally for collector cars but they've added several categories including electronics.

Edit:  I just noticed the Electronics section in fact does not appear to include eBay listings (as do the classic car sections)  But eBay is easy to search - finding all the various craigslist postings is still pretty valuable IMO.

Ron