| http://www.w3.org/ns/prov#value | - It shall be unlawful for any person engaged in trade or commerce, in the course thereof, to lease or make a sale or contract for sale of goods, wares, merchandise, machinery, supplies or other commodities, patented or unpatented, for use, consumption or resale in the commonwealth, or fix a price charged therefor, or discount from, or rebate upon, such price on the condition, agreement or understan
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