Is it legal to sell things without a license?

Like so many other answers, it depends on the circumstances. As a private owner, it is perfectly legal to sell something that you purchased to someone else. However, there are lots of instances where it may not be. For instance, you may only be able to sell a certain number of things before having to have a license, such as selling more than 2 or 3 cars a year may require you to have a dealer's license.

If it is something that you are making, you may need a license depending on what it is. If it is a food item, you may require health certifications. If it has copyrighted logos on it, you need a license to use the logo. Some communities require you to have a license to conduct a garage or tag sale.