It doesn't matter what anyone thinks if you end up with a car you like.
Maybe these questions will help you decide:
- how much do you have to spend to buy an 85 190E with good engine and working AC in your area?
- how much can you sell your car for when you're done working on it?
If the answer to either question is less than $4000, then it appears as though you didn't get the best deal. But again, if you like the car, who cares?