It is SO weird how synth prices change... but more strange than synth prices are the perception of synths.
It wasn't that many years ago... five or so... that CS-50s (and 60s) were regarded as inadequate and ridiculous because of their limited polyphony and organ-like presets.
I bought one of them on eBay for under $200, but that was because of a typo (it's amazing how unwilling people are to buy syntesizers
). I was dubious about it because it is hard to disregard all of the noise you see people type on the internet. I played it for about 10 minutes before I realized how insanely powerful it was (despite the 4 voice polyphony and single layer of oscs). Yes, powerful... don't make me drone the amazing list of functionality!
It is designed VERY well for live performance. The slider knobs are HUGE, and so is the "dashboard." I swear, it's like a Star Trek bridge prop. I bought another one for $500 (which was only slightly above the going rate- because it had the music stand!) and used it (music stand or not, it wasn't in as perfect of shape as the first I had bought) on stage a lot in Minneapolis. (yes, it is heavy... and there wasn't much room for it at the Uptown... but WORTH IT) I was actually teased for paying "that much" for a "single osc 4 voice synth. (come on, why do you need more than four voices in a band? If you're playing more than 4, you're probably taking up too much band bandwidth!)
And yet... here everyone is talking about how $999 is a reasonable price. Amazing.
I'm not sure I would pay that much for one, even though I scream their praises.
Then again, you don't see me throwing mine up for sale, either.