I live in a normal block of flats (25 in all - built in the 1980's) We are very close to town centre, with theatres, cinemas, beach, park, shops, library, etc.etc.
Good sized flats all with two bedrooms and bathrooms. No age restrictions on who purchases them, although nearly all owners are retired or close to that age. Ground floor is
entirely taken up with our garages and we also have a small car park for visitors, tradespeople, etc.
Managed by ourselves - all volunteers, keeps service charge fees down and ensures all jobs are carried out properly and quickly.
No problem selling them, indeed have people waiting for them to come on the market.
Our flats sell for less than the local retirement ones, although these are so much smaller than our flats Whereas we do not have a communal lounge, we have a large, well looked after foyer in which we hold the occasional meeting/tea party/coffee morning, etc. People here form friendships and only yesterday six of us went out for Sunday lunch together.
Being so close to all the local town amenities it enables us to have lots of interests all easy to get to.
Our service charge is nearly half that of the local retirement properties. All our flats are owner occupied, we very much discourage 'lettings'. Obviously some people here have carers who may come in daily, etc. Flats being sold do NOT have to pay anything from that sale to the Management company - as they do in retirement properties.