p1800 repair help

so i nicked this guy's 1963 or so p1800 a couple of days ago. i put about a 3 inch chip in the paint on the back right panel, as well as a minor dent in the chrome trim just above the scratch i made in the paint. its the little bit that goes to a point near the tail light. i was wondering what i can expect to pay this guy in damages. a little paint, perhaps a new side rear chrome trim. i'm fine paying for repairs on this fine automobile, i just don't want to be taken advantage of in the situation. thanks.

ron