Owning a Beta is fairly easy as long as you know what your getting into.
Mechanical parts are fairly easy to maintain if your handy with the spanners. Old school garages won't have any issues. Most parts are easy to locate especially service items but trim parts are getting harder to find. I've found them reliable, providing they are looked after properly, but the same can be said for any 30-35 year old car.
You get what you pay for and the really good examples demand the highest price. Each car should be judged on its own merits.
I've owned several Betas, my current one for over 20 years, I'm restoring my second one right now and I've loved every minute of owning them.