I have a 2000fc/m,
The 2000's main issue is that it's easy to damage the shutter curtains with the film back removed. Replacements are difficult to get, but realistically, if you could get a replacement shutter curtain, the cost of getting that service done is the same a another used 2000 body.
The other issue that can brick the body is the electromagnet failure, as there are no replacements. But as above, the service if that part was available would cost as mush as another used body.
The other negatives are: the metal FP shutter is pretty loud and sharp - the sound is not as nice as a 500 serise.
The batteries last for ever, half dead batteries work fine in the 2000 body. (this is not true for a 200 body)
They can use both the C/CF lenses or the F lenses, so you can do anything a 500 serise canera can do as well as use all the F lenses. You can also modify any other lens to mount on it. However, if you are not planning to use the faster F lenses, then it is pointless to purchase a more expensive 2000 body over a 500.