I have a specific question about Shell Island which is not managed by HGVC. I read on a thread elsewhere that when a unit there is sold there that it is no longer a HGVC unit. How do I know if a resale unit is an HGVC unit? Also, if I purchase a unit that is not HGVC can I get it back into HGVC. As you can tell, I want to be apart of HGVC.