The store had 2 windows, a big one, where the 'sweet spots' (there were a couple I think) were placed, and a smaller one, on the side. In that smaller one he usually put stuff that was new or on sale, last pieces of last year's items, etc. He changed that one more often because it was there to serve a purpose (increase the sales of what was there) not to attract people to the store (that's the main window's purpose).
My dad's store as it appears in Google Maps. The side window isn't even visible from this angle |