el indio:
That Model 30-1 .32 Hand Ejector was manufactured between 1961 (serial number 712954 & 1969 (serial number 826977).
If the cylinder latch is flat, then 1961-1966. If concave then 1966-1969.
If the grips are original and have an uncheckered diamond around the grip screws, then 1968 or earlier. If checkering runs up to the screws, then 1968-69.
In 2006 the standard catalog of S&W gave a value of $225 in very good condition, $275 in excellent. I'm Australian, so I can't help with current U.S. values.
The -1 in the serial number refers to the gun using the J frame, rather than the earlier, smaller I frame. Modern J frame grips should fit.