Now re-selling is something I don't know. Would the prospective buyer have to be approved in some way?
I'm sure they don't all work the same, so look around. There is a retirement village a few miles from me - it is something else. It is a gated community with its own health centre, IT room, gym, swimming pool, badminton courts, library...
But far from a proper established local town or village. Not for me.
Sorry, I'm rambling. Just take your time and make sure you are buying the right flat for YOU - not what other people think.