Opuntia monacantha monstrose variegata
Fun cactus and not horribly prickly! Just like with humans, variegated plants (especially the white parts) handle the sun less well than "tan" (i.e. green) varieties. This one needs shade or bright indoor conditions... and regular water like most plants need. I don't know if it can handle Arizona summer heat.
The shopping cart does not allow me set a by-car delivery fee (possibly free) by location and order size. So, the fee will be collected in cash at the time of pickup (please hide it for me in a shady spot where you want the plants to be delivered).