What kind of problems should I look for in a 1976 Cadillac Eldorado Convertible?
Before performing the inspection, test drive the car look for obvious stuff steering pull, Oil leaks, A/C & heater functioning properly. Check the fluids with white paper towel or rag for sign of darkness. Check the door locks, Power windows, antenna and everything else such as wipers, washer, interior/exterior lights, etc.
Here is million dollar advise. Before you buy this car find a Good Mechanic who is totally familiar with this type of cady and knows it real well. Have him do the pre-buy inspection. You can then use them for further repairs as well. Car being old, you may not be able to get good inspection at the Cadillac dealership. Most of their techs may only know the newer models. Believe me when I tell you this you need a good Mechanic that knows this car, this way he can save you money on repairs by spotting the problems before it gets bigger.