Quick old man

Two young businessmen in Florida were sitting down for a
break in their soon-to-be new store in the shopping mall.
As yet, the store wasn't ready, with only a few shelves and display racks set up.

One said to the other, "I'll bet that any minute now some
old fart is going to walk by, put his face to the window, and ask what
we're selling."

Sure enough, just a moment later, a curious older gentleman walked up to
the window, looked around intensely and rapped on the glass, then in a loud voice asked, "What are you sellin'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."