There is no limit to this right. This is an absolute. Man has the right to his own effort i.e. the right to his own mind and the right to his own labor. The right to property guarantees that man has the right to gain, to keep, to use, and to dispose of his effort. Without the free trade of man's property, man would be isolated.
Free trade is the social application of the right to property.
This to is an individual right. Man is free to voluntary trade his effort for the effort of other men. Every part of free trade is derived from the right of the individual. Individual choices, individual agreements, and individual relationships are all voluntary. Man has the right to support his life by his own effort.