(b) Whenever it is claimed, or appears to the court, that a contract or any contract clause is or may be unconscionable, the parties, in order to aid the court in making the determination, must be afforded a reasonable opportunity to present evidence as to:
(1) The commercial setting of the negotiations;
(2) Whether a party has knowingly taken advantage of the inability of the other party reasonably to protect his interests by reason of physical or mental infirmity, illiteracy, inability to understand the language of the agreement, or similar factors;
(3) The effect and purpose of the contract or clause; and
(4) If a sale, any gross disparity, at the time of contracting, between the amount charged for the property and the value of that property measured by the price at which similar property was readily obtainable in similar transactions. A disparity between the contract price and the value of the property measured by the price at which similar property was readily obtainable in similar transactions does not, of itself, render the contract unconscionable.