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A Covina man was arrested Tuesday after allegedly price-gouging the public by marking up the price of N95 respirators and selling them online.

Investigators were given a tip about the online ad and found two posts that were advertising masks for $300 per box, the Baldwin Park Police Department stated in a news release.

A meeting was set up with the seller, identified as 30-year-old Johnwill Baldonado, where investigators purchased a box of respirators for $300.

Police arrested Baldonado on suspicion of price-gouging following the sale, the release stated.

Investigators said they found 21 boxes containing a total 420 N95 respirators during the arrest.

“During a state emergency the law prohibits charging a price that is more than 10% what an item costs before the state declaration of emergency,” the Police Department stated.