Mich. Comp. Laws § 750.490a

Sec. 490a. An officer or employee of any governmental agency shall not purchase or cause to be purchased any goods, wares, or merchandise of any description in the name of or on the credit of the governmental agency for any other purpose than for use or resale in the regular course of the official business of the governmental agency; or sell or offer for sale goods, wares, or merchandise purchased in the name of or on the credit of the governmental agency, at any price other than the price at which such goods are offered generally to the public by the governmental agency. As used in this section, "governmental agency" means any and all branches or departments of the state government; any and all branches or departments of the government of any county, city, village, school district, township, or other municipal corporation in this state; and any commission, board, or other similar body organized to assist in the conduct of the governmental or proprietary functions of state or local government. Any person who violates this section is guilty of a misdemeanor punishable by imprisonment for not more than 90 days or a fine of not more than $500.00, or both.