I think $500 for a family deal would be OK. In NYC area it could be more but in truth you will spend a good deal on it to make it a dependable attractive car. However if its not a rust bucket I would suggest making your case for being the right person to restore the car. Figure that to do the brake system properly you will spend about 300-400. The price of the interior parts are reasonable and if you are handy doable on your own. $1000. Paint would probably be best done in a professional shop. $3000-5000. Then there will be new tires $00-500, battery, door seals, etc.