I hunted over some of the original prototypes for 3 years.
It's a hell of a caller, with a great remote.
But it doesn't live up to most of the claims you hear about it, and it is extremely over priced.
I'd be willing to buy a used one at a reasonable price, But having talked to the company's owner, I'd never buy a new one out of fear of putting a single dime in his pocket.
I've had a couple of JS 512's and consider them the best electronic call on the market. ( have you noticed how many companies are trying to copy their design?) The next caller I buy will most likely be the JS 612, it has auto reverse, very handy when calling for lion or bear.
Tim