Californians line up to legally buy recreational pot

(CNN)California began selling recreational marijuana Monday in what's seen as a milestone in the mainstreaming of the weed, and hundreds lined up to buy it.

Lines formed outside stores licensed to sell the drug long before opening hours, and store owners said they had stocked up in expectation of huge demand.

"It is probably our busiest day in our seven-year history," said Matt Lucero, the owner of Buddy's, a dispenser of medical-use marijuana in San Jose that holds the first license issued by California to also sell recreational marijuana. "We have folks outside; every chair in the building is filled right now."

At Harborside dispensary in Oakland, hundreds lined up to be the first to buy the legal weed, CNN affiliate KGO reported.

Speaking with CNN, Lucerno said he expected a 30% bump in sales overnight, but "it looks, in looking around this room, more like 50 to 60%."

A sign advertises deals at Harborside marijuana dispensary on Monday.

California is the sixth state to allow sales of recreational marijuana, and as the nation's most populous state, it's widely seen as a tremendous boost to mainstreaming marijuana.

"Cannabis is now legal in the most populous state in the country," New Frontier Data, which tracks the cannabis industry, wrote in its 2017 annual report, "dramatically increasing the total potential size of the industry while establishing legal adult use markets across the entire US Pacific Coast given the legalized states of Washington and Oregon."

Pot remains illegal in the eyes of the federal government, and it is illegal to take marijuana across state lines, bring it on a plane or mail it.

Different types of marijuana sit on display at Harborside dispensary.

The California industry is forecast to reach $7 billion in a few years, more than the $6.6 billion of the entire legal cannabis market in the United States in 2016, according to New Frontier Data.

Legalizing it will mean a lot of people may try it who had shied away until now, Lucero said.

"By having the state come in with a regulatory program really helps legitimatize it," he said. "And I think we're going to be seeing a lot of folks who otherwise are a little hesitant to shop at dispensaries. "

California adults 21 and older can possess as much as an ounce and grow up to six plants at home as of Monday.

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Monday was a muted rollout, though, because the licensing procedure is not in place in many cities. No recreational marijuana could be bought legally in Los Angeles or San Francisco, the state's biggest cities.

Buddy's had "stocked up tons because we've seen other states, once they go recreational, how most of the dispensaries sell out on the first or second day," Lucero said.

State and local taxes add a hefty chunk to the price, and depending where it's bought, taxes can add as much as 45% to the cost.

Customers at Buddy's could pick up half an ounce of Homemade Cherry Pie for about $260. Blue Dream is about half that price. Many customers pick up an eighth of an ounce for anywhere between $25 to $60.

A customer buys marijuana at Harborside marijuana dispensary in Oakland.

Massachusetts will begin selling retail marijuana on July 1. Maine has approved it, but there is no set date to begin sales.

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Other states that allow the sale of recreational marijuana are Colorado, Washington, Oregon, Alaska and Nevada.

More retail shops are certain to open soon in California. The Bureau of Cannabis Control, which issues licenses from the state, had handed out about 200 by the end of last week, spokesman Alex Traverso said in an email.

As far as he's concerned, the first day has been a success, since he hasn't been besieged with calls and emails.

"That's huge, because I'm certain we'd be getting tons of calls if things weren't working," he wrote. "So far so good!"

CNN's Miguel Marquez and Aaron Smith contributed to this story.