Used Car Dealers In NJ | Used Cars For Sale In NJ

Interested in a list of used car dealer auction locations.
Seeking any information on the car business.
I am thinking that if I could get into the auctions, then
I would be able to do my own research as to what vehicles at these auctions cost the dealer. Someone out there has this information. It is either this, or pay a membership from the internet. I am not sure how useful these membership sites actully are. This may be the source that I end with.
I am anxious to get this research completed.

I am working p/t and trying to struggle my way through college and saving some money on the side. I like selling things to make profit, what do I need to become a used car dealer ? I know I will have to rent a little parking lot or something and have the funds to buy some used cars to start but how can I get the used car plates, licenses and stuff ? Thanks!