I would at least get it out and get someone to help you evaluate it. About 2 years ago I was willed a '73 C10 that had been in a barn for 20+ years that belonged to my uncle. Engine compartment full of shredded feed sacks, mice ate some wiring, had a huge rat and more shredded sacks in the interior. I pulled it out and got it running and brakes. But I can't keep them all. I sold it and roughly broke even. Would I do it again-absolutely! But that is me. If I was in your shoes I would at least want to get it out, look it over, and if it wasn't too far gone get it driving and stopping again. Unless it has water in the cylinders there is a shot at getting it unstuck. Do you have a covered place to put it and work on it?