How rare is the ford edsel car?

They are pretty rare. The Edsel was only made 3 years. 1958, 59, 60. Production was:

1958--70,863 + 8,000 in Canada

1959--44,758

1960----2,846

Of those only around 1,700 are still on the road today. As you can see it is a pretty rare car especially the 1960 model.