Agave ovatifolia. This is a solitary (non-offsetting) succulent that grows from 2 to 5 feet tall
by 3 to 7 feet wide with a rounded rosette of short wide gray leaves
that are distinctively cupped. We've found to be cold hardy to at least 20F. Leaves break easy when moved, but are very durable in many climates. You are bidding on the plant size shown, which is about 14-16 inches wide.