I'm not familiar with that particular box, but I'm always checking out toolboxes on CL. Based on the prices in my area, I'd say $700 is a fair price, but not a killer deal.
I'd skip it based on recent interaction with Mac tools. They are having a difficult time finding parts for a coworker's MB7100, which would be of about the same era as the box posted. I bought that box new in 1996, and sold it to my coworker in 1999 or 2000. If you want a pro level box, by a Snappy.......JMHO.