Original, Garage Kept, 1970 Chevrolet Impala

Pictures help, but I would consult Edmunds to see what others are selling in there for with similar attributes to yours. An ebay auction is also another good place to see what the market will bear, meaning you can set a higher reserve the first run, then based on interest, lower it. If there is something unique or rare about it, that could justify a price bump, but despite it being a clean well kept 70 Impala, most people are still looking for a good deal. I would advise you consult some classic car dealers, and ask their opinion, see what they might be interested paying for it. If that number is okay to you, the burden to find a real buyer will be theirs. NADA also has classic prices, and unless it's perfect, don't expect retail, hope this helps.