It's got to be in Beverly Hills Cop I. It's the line where Axel Foley comes in the art store and there's the salesman (Sergie or something ;D) and Axel asks when he see a spinning table:
Axel: Do you get to sell this shit? Sergie: Oh yes Axel: When was the last time anybody buyed this? Sergie: Yesterday Axel: Get the fuck out of here! (whit some itchy scratchy sound)