All arrangements, contracts, agreements, trusts, or combinations between persons or corporations made with a view to lessen, or which tend to lessen, full and free competition in the disposal of state surplus personal property, under this part, and all arrangements, contracts, agreements, trusts or combinations between persons or corporations designed to, or which tend to, control the price, which the state receives for such property, or the cost to the purchaser of such property, are declared to be against public policy, unlawful, and void.