What's wrong with it and what model do you have?
+1. It would be most helpful if you would list the models that you have and each of their symptoms.
Naturally, the socketed Amigas (1000, 500, 2000 & 3000) are much easier to work on. That's part of their continuing popularity. Have you tried to gather the schematics, info, advise, and tools to do the repairs yourself? Having the technical docs in hand may help you convince a repair shop to give it a go.