i found this shotgun at a fun show today for $100, and it looks to be in pretty good condition. i'm debating whether or not to go back tomorrow and get it. is this a good deal?

DON'T BUY IT.

The Eastfield 916 was an early S&W attempt at a pump shotgun, that was a terrible failure that embarrassed S&W for years.

The Eastfield was a version of the old Noble Model 60, that was apparently made for S&W by Howa of Japan.

The Eastfield 916 is notorious as possibly the worst firearm ever offered by S&W, and was a major embarrassment to the company.
The guns quality is poor, and breakage and reliability problems plagued it until it was discontinued.

Best spend your money on some other shotgun.