If it's a replica of a 1960 jazz, then does it have 2 stack knobs? If so, I'd jump on it.
I don't know where you're located, but MIJ jazzes have jumped in price recently and are upwards of $750.00US. Also, the variety of color choices is primarily limited to Asia, so if you want anything out of the usual sunburst, black, or white you'll have to order from Japan (and then find a dealer who will do it for you. So far, I've had good success with
http://www.guitarshogun.com). Checking the rate of exchange on an MIJ jazz in blue, (my first choice, for example), it would cost me about $900.00-$920.00 shipped from Japan to the U.S.
Ultimately you should buy what you really want, but I'd grab that 80's MIJ if I were you.