On-Line

I am new at the entire on-line commerce thing going on, but I really do want to participate. I do not know if I am starting out with a sale that is too big or not though. I have always sold my cars as a trade in but I am looking to sell cars on-line. I have a couple in the garage right now that I do not need and I would like to experiment with the on line market. Should I scale back my first sale and go with a smaller priced object before I try to get in to the big money?