You won't make much money. You might get enough money to pay for the cost of gasoline taking it to the scrap yard.
Check with the scrap yards around you though because not all scrap yards accept appliances.
Some do and some don't. And some require the compressor to be removed before the scrap yard will accept the refrigerator.
If you don't want to take it to the scrap yard yourself you can post an advertisement on craigslist stating you're giving away a scrap refrigerator and most likely they'll be a scrapper out near you that would be glad to come by and load it up and cart it off for free for you.