Up for bid is a pad of Opuntia robusta. This makes a great addition to any garden or as a houseplant in cold climates - they get large blue-green pads that can grow to well over 12 inches in diameter when mature (and this form is very spiny, although the spines will be clipped for shipping), and beautiful yellow flowers and edible fruits.
This particular form of Opuntia robusta is more cold hardy than the species typically is and has survived in a zone 6 garden unprotected without any damage down to -13F, so it is hardy to USDA zone 5b or 6 at least, so this plant is very cold hardy. These great little plants would be great to grow on to add to your rare plant collection.