CA Gov't Code Section 50303

A local agency shall not receive any charge in excess of a reasonable charge for the sale, leasing, licensing, or other use or disposition of its real property. A local agency which receives in excess of a reasonable charge shall repay the amount of the excess, with interest from the date of collection, to the person from whom the excess was received. This section does not apply to the sale of property when all of the following conditions exist:

(a)

The property is not occupied by a lawful tenant of the local agency.

(b)

Improvements have not been lawfully constructed or installed and maintained.

(c)

The property is sold to the highest bidder upon a call for bids.