Ribbons are almost indestructible except for one bit - the ribbon - which is so fragile that you can be assured it is wrecked. Even a sudden breeze can wreck a ribbon. However ribbons have made something of a resurgence in popularity, and there are now quite a few people that will repair them for you. The ribbon is nothing more than a piece of very thin aluminium foil that is corrugated and held at each end. It is possible to rebuild them yourself if you are a bit handy, and meticulous. But with a vintage mic like this, you may prefer to have it professionally repaired. Beware, it won’t be cheap and will exceed the price of the mic.
The other thing that can happen, is that the magnets may lose strength over time. Magnets can be remagnetised, although the equipment is specialised and rather brutal.
The only other component is a transformer. This is usually pretty hard to wreck.
Personally I would buy it in a heartbeat and have some fun with it.