If I was that kid I would have played along, and shown up at the gas station, but I wouldnt have brought any weed with me. So when the cop(s) burst out and arrest you they dont have shit, and now you have about 24 hrs to get all the weed outa your house before they come knocking with a warrant. This way if the guys legit you just take him back to your place and sell him the weed.