I have never paddled one, but they are frequently for sale cheap in southern california, like $400.
If they are anyhting like most older skis, the shallow bucket means they are much more tippy for a given beam. This is just a simple fact of your COG being higher. Most new boats have deep bucket, some flat spot near the center of the hull, and are thus more stable for a given beam.
Like Ranga recommends, the leg length needs to be perfect and the stability needs to be manageable. Its an older boat design that has been surpassed by all modern boats. If its the only ski around you or all you can afford, its worth looking at. But if you have access to more modern boats, I would recommend something more recent as they perform better in nearly every way.