A car in excellent, fully restored condition with all original parts and complete documentation (owner's manuals, etc.) could be worth $150,000 or more. This is a high-end estimate for a truly exceptional example.
However, a car in good condition, needing some restoration, or with some non-original parts would be worth significantly less, perhaps in the $75,000 - $125,000 range. The lower end of this range would apply to a car needing considerable work.
A car in fair condition or needing major restoration might only be worth $30,000-$70,000, depending on the extent of the needed work and the availability of parts.
To get a more accurate valuation, you need to:
* Have it appraised by a classic car expert: A professional appraisal takes into account the specific details of the vehicle and provides a written report with supporting documentation. This is crucial if you plan to sell or insure the car.
* Consult classic car valuation guides: Hagerty, ClassicCars.com, and other similar resources provide estimated values based on condition, but these are only estimates.
* Check recent auction results: Look at prices achieved for similar Buicks at reputable auctions to get a sense of the market.
In short, there's no single answer to your question. The value is highly variable and depends on a detailed assessment of the specific car.