Ala. Code § 18-1A-192: Opinion Evidence as to Value.

(a) Upon proper foundation, opinion evidence as to the value of property may be given in evidence only by one or more of the following persons:

(1) A witness qualified by knowledge, skill, experience, training, or education to express an opinion as to the value of the property;

(2) An owner of the property; or

(3) A shareholder, officer, or regular employee designated to testify on behalf of an owner of the property, if the owner is not a natural person.

(b) This section does not preclude the admissibility of other evidence explaining or enabling the trier of fact to understand and weigh any opinion testimony given under subsection (a).