I bet you'll get more if you sell as a lot with a "no dickering policy" or more still if you sell individual. I know some guys here that sell on craigslist and occasional local meets and completely fund their projects. They are leery about PayPal so cash makes a deal safer for the seller.
You'd be surprised how many guys are looking for single parts. Some people would rather buy individual part than buy a parts car/truck. Where I am there is no room or storage space so a parts car is impossible.
