Your suspicions are correct. It's not henkellii. It's Afrocarpus mannii most likely - could be gracilior. Some are hardier than others, but marginal for me in 8b. There is one in Tifton, GA.

Oh great, now I'll have to watch it freeze to death. At least it was not terribly expensive. Maybe plant it against the south side of the house but still probably a goner sooner or later. We are right on the 8a/b line but have many longer freezing events. So Jason, is it less hardy than a satsuma?

It depends - these Afrocarpus seem variable, but with some winter shade and in a protected spot, they seem to be a possibility in zone 8. I would say keep it potted until next spring and plant early so it can get established well before next winter. Choose a good spot and hope for some mild winters! Alternatively, these make good houseplants or container plants..can stay in pots forever.