Uwe has one. drbassman had one, I presume his family still does.
The EB-650 was more-or-less a bass version of the Gibson Trini Lopez Deluxe guitar. The only actual connection to Trini that I'm aware of is that
Art Greenhaw of the Light Crust Doughboys has one, and Art did sessions with Trini.
Rob's book says 1989-92, that sounds right.
That price range seems fair for 2018. They don't come up often. I never saw one go for over $2600 and that was maybe 10 years ago. A couple of years later, Kevin Borden had one listed for something like $4500 for quite a long time; no idea if he ever sold it or at what price.