Laurie,
I have an agave that looks similar and might be the same as above that I had for many years. I gave many pups away already and the mother plants stays small at about 6 inches. It is a great house plant.
The following are exactly the same only with some variegation with different names.
And below is my all time favorite. Thanks again to 'Dutchlady1'.
Same type with out the white.
I have pups of the all green type and the last one pictured. Any takers? Just pay postage.