One said to the other, "I'll bet that any minute now some senior is going to walk by, put his face to the window, and ask what we're selling."
Sure enough, a moment later, a curious senior gentleman walked up to the window, looked around intensely and rapped on the glass, and in a loud voice asked, "What are you selling' here?"
One of the men replied sarcastically, "We're selling ass-holes."
Without skipping a beat, the old timer said, "You must be doing well. Only two left."
Seniors -- don't mess with them, They didn't get old by being stupid!