By Nina Zdinjak As marijuana prices in some states drop, cannabis companies blame oversupply and are demanding a halt on the issuance of new licenses. According to the data from the Colorado Department of Revenue, the price per pound of all commercial cannabis reached a record low in September. RELATED: Why Are Marijuana Sales In Colorado Plummeting? In addition to the sales decline, wholesale prices seem to be dipping to record lows, which is why a group of Colorado growers is asking the state to stop issuing cultivation licenses. Medical marijuana (MMJ) sales in Colorado have significantly declined.