10,000 is way too much . . .
There is a SH3 and a SH3a - the SH3 is the more desirable, with 100 or less ever made (I've seen reports from 37 to ~100). Plus, the SH3 is reported to have the rare and stolen moog filter. The subsequent model, the SH3a, is the model that didn't have the moog filter and many more of those were made. Not to mention it was monophonic and had *one* oscillator.
I think that site might have it confused with the SH3 because there isn't any way the SH3a is worth that much. The SH3 however, thats up for debate . . .