Should I contact the police ?

So I met someone on offerup to buy a iPhone and I check the phone out and everything seems okay so I give the guy the money for the phone then he leaves but the next day I reset the phone and then I notice an icloud account locked into the phone and I text him asking him for the info for it and he says he doesn’t have it or know it and I ask for a refund but he refuses to give me my money back for the phone and blocked my number so I text him from another number and I told him I am contacting the local police and he still didn’t respond, what can or should I do I took a picture of his license plate number with him in the picture should I contact the local police I believe he stays in my hometown or would that be a waste of time? The only issue is the phone doesn’t come back as lost or stolen when I search up the imei phone information it just has a icloud lock nothing else