Doing a bit of googling threw up the following info.
It would appear that the early models were made in Japan, were similar to a Wurlitzer and used Wurlitzer tines however the later models were electronic, presumably some sort of divide down tone generation. It seems there were a few different models and that Gibson imported some models and re badged them as Maestro. You could look for a model number bu if you opened it up you’d have a better idea.
Yeah it got me curious because I’m not sure whether it’s one of their early electromechanic models (that are said to combine Rhodes and Wurli approaches) or a later electric piano. Looks too tiny for the former and too big for the latter. And the seller is too far from me.
If it’s electromechanical, $65 ain’t much for the experience of tinkering with it.
If it’s an electro that’s very cheap! You’d have to ask the seller for an idea of weight as the electro models are said to be roughly the same weight as an EP200. The electronic ones will be considerably less.