1. As to who are generally incompetent to sell.

2. Who are relatively incompetent to sell.

3. Who are generally incompetent to purchase.

4. Who are relatively incompetent to purchase.

The questions who may sell, and who may buy, real estate, may be conveniently discussed, by assuming the existence of a general capacity to enter into the relation of vendor or purchaser; and by then treating of the exceptions to the general rule.

Incapacities to sell or buy, may be considered as of two descriptions; 1st, such as depend on some circumstance personal to the proposed vendor or purchaser, and affecting his general capacity to buy or sell any real estate: and, 2ndly, such as depend on the relation in which he stands to the particular property proposed to be sold or bought; or to the party with whom he purposes to deal.