Yea, they were good for the most part, but the stator was a common problem, and the carbs are not easy to work with. My dad had a new 84 and it didn't sit terribly long, maybe 6 months, and the carbs were a disaster. They are CV carbs, and 2 of them the diaphrams were all rotted and they were $100 each. This was 12yrs ago. After cleaning the carbs, replacing the diaphrams it still ran and idled very poor, then the other two diaphrams rotted, so with clean synced carbs, all four new diaphrams I figured I would be in good shape, but it still idled and ran poor. My dad decided to quit riding, and gave me the bike. I gave up and sold it and got the GL1800. I would never want another GL1200. It was good when it was new, but after aging looking back at the motorcycle, my dad had a lot of issues with it.
I sold it for $2,000 even though it wouldn't run right, but this was back in 2008. Seems they can be bought for less, but there are some really cosmetically challenged to say the least. If it's really nice and not all garbaged out it might be worth working with if you have the desire.