I haven't sold much stuff on here, but the items I have sold have never lasted longer than one week. Take your time and describe the item well, take some very good high resolution pictures of your item, pictures that if you were a buyer you would want to see right away. Make sure the pictures are in focus! My philosophy is that if the seller doesn't care enough to make his for sale pics in focus, then that's probably the attitude he had with his equipment and didn't care for it very much. Be sure to respond to emails in a timely manner, offer up any info you haven't already, and most importantly, just be honest with them!
In terms of your particular package, I would consider parting it out, sell the engine/pipe, chassis, and wheels/tires in their own threads. List a reasonable price for each, include OBO, and make the price include shipping costs as well. That way a buyer knows exactly how much it costs out the door. Don't worry, there's a butt for every seat!
