I am MANMADEMADMAN aka Shane Etter and I've been fanatically collecting synthesizers of all types since 1992. Most of the ones I find are vintage analog, but only some are "keepers" as I am highly opinionated. In fact, I'll talk your ears off about why I like what I like, and why I hate the ones that sucked.
In the 1990's, I made over 6000 program sounds for Kurzweils K2000 series, all by hand. I called it "sound subscriptions" and I would email people 100 sounds a month. People still contact me to purchase them, as Kurzweils V.A.S.T. was very difficult to understand. The sounds are still current today.