I've been looking for a good deal on a CT90 for quite a while now as well. Missed out on a beauty for $1400 that was sold in under 30 mins last year, was in perfect condition. Ones in reasonable condition seem to go for around 2-2.5k, and ones that need a lot of work are like 1.5k.
I can't wait for the used bike market to come back down to earth.