If you buy and sell even 1 car for profit you need a dealers license. If you are selling a car and are not selling it for profit you do not need a dealers license. In essence this means if you sell your own car you will not make a profit so you do not need a license.
only 51, kind of a weird number though.
The number varies from state to state. It is not an auction license you need it is a dealers license.
Wholesale car dealers license in Texas are issued by the Texas Department of Motor Vehicles, motor vehicle division. Dealers must also register with the Texas Department of Transportation for a GDN or general distinguishing number.
Best advise I can offer on this is contact your local trading standards office Your local council switchboard will have their number.
You must sell 146 cars to keep your license.
Many states have a limit on the number of cars that you can buy/sell in a year. That will determine if you're breaking the law.
This is a local question. Generally speaking the license is actually property of the state that issues it and may be held for any number of reasons.Licenses are often kept if the license is not valid, if you are arrested for a traffic crime requiring license suspension, or if the license is held in lieu of bail.
The number differs from state to state. What state are you asking about?
NONE
Why would you drive without a license? That's problem number one.
Unfortunately, that CAN NOT be done (in the USA at least) :(
You can be convicted for number of faults if you are driving without a driving license. For example you can also be convicted for not having insurance. Because driving without valid driving license invalidates your insurance also.