The Wes Cooley GS is probably the most beautiful UJM. But yeah, that's a bit high.
I sold my GS1000S a year ago. That one is about 100% overpriced.
It's also a 1979 model, not a 1980. In 1979 they had round turn signals and no rearset footpegs, in 1980 they had rectangular turn signals and rearsets.