Hi - long time member of bikeforums but totally new to tandem riding.
My wife and I picked up a Burley Bossa Nova from Craigslist as a bit of an impulse buy over the weekend. From the drivetrain (6 speed freewheel, Suntour XC Pro rear derailleur and shifters, and 'Self Energizing' rear brakes) we're guessing it's a 1990 model. We paid $400, which seemed reasonable and the seller was a nice old guy so we didn't haggle over it. It's pretty much original except for the saddles, and the condition is fairly good. It's definitely been ridden, and has some deep paint scratches probably due to transport (with rust on the exposed metal), but overall seemed in good shape.
The afternoon we bought it we put in a 60 mile ride on a mix of road and gravel, which I thought was pretty good for our first ever tandem experience. We even managed to coordinate pedaling while standing, although we mostly rode seated. By the end my arms were killing me due to the too-long captain's stem, and we'd broken a rear spoke, but other than that, it was awesome!
We're definitely excited about this. Best part for me was yelling "More power!!!' over my shoulder to my wife