I noticed plumerias have gotten very very expensive in the gardening centers - saw $29.99 for 12" size plumerias yesterday in Lowe's. Mine are all from cuttings. But you have to be very patient, they are slow growing and not all of them bloom each year.
Waiting for these to bloom (they've got buds on them). Unfortunately, I think I may have lost the purple one this year - the drainage holes were blocked and I didn't see it until it was too late. My son drained out the water but the plumeria hasn't come back. It is at least 20 years old grown from a 6" cutting that I paid $40 for.
