Oh another thing definitely worth too much now are techstars and crappy simmons sds 8, 9, 200, 400 etc. and the Pearl drum synths. The Vermonas of yesterday. Actual the pearls can't be compared to the Vermonas. They are way better and crazier than them.
I bought all of my techstar (305 and synth/clap module) and pearl (2 drx1s and SC40) drum synths for less than $100 per module within the past couple of years. I paid $30 for the SC40 and $50 shipped for the synth/clap module which even had a wikkid LFO rate mod on the back.
Servicable? Fun? Yes. Worth over $200 per module, now? Hell, no!