Much like a TB303 you'd be buying a piece of musical history, but you'd also be an idiot.
You would be a rich idiot in around 20 years time, when they reach a value that would make you cry when you look back at this thread and think, now who was the idiot here?
I saw a Roland SH101 in Holburn Hifi in Aberdeen, way back in 1991. Fifty quid. Cheap even then.
"Oh, Malc said he was going to buy that", says Gav.
"Aw okay then, I'll let him get it. I'm a bit short of cash this week anyway."
A few days later, "Hey Malc, did you get that SH101?"
"No, I was skint. Did you get it?"
"No... shit."
But alas, it was gone. Bugger. Fifty sheets for an SH101. I saw a scruffy-looking one on eBay for 600 the other day. Bugger bugger bugger.