Good point. I wasn't paying close attention. One additional note: the N roofs are $10.95, the HO ones are $6.95. At that price I'm afraid I will not be stocking up.
But the N scale is
enough for 4 cars and the HO will only do one car.
When I ordered mine a couple months ago they were 2.95 each so this is even better (except that I was able to order 6
)
Jason