Discussion about the Korg PolySix synthesizer

New to the list.

I owned a Polysix in 1982(?) that I loved. Foolishly sold in 86.

I really want that old sound and adjusting multiple parameters on the 
fly.

Browsed around eBay - were is the best place to find a good used one? 
I have heard the batteries leak...

What a decent price for one these days?

Thanks,

stephen