How many vehicles can a person sell in a year without needing a license?

In Texas, an individual is allowed to sell up to four vehicles in a calendar year without having to obtain a vehicle dealer license. This regulation is designed to differentiate between casual or occasional sellers and professional dealers. Selling more than this limit requires licensing to ensure that sellers meet the necessary legal requirements for consumer protection and proper tax collection. Thus, since four is the maximum number allowed before needing a license, it validates the selection as the correct answer.