Indeed a very old estate. Most owners are probably in their 60s, reluctant to make any changes and have sentimental values of this place. Rental yield is low. Give these owners another 8-10 years, they may consider if there is a good en-bloc offer. If you are keen to buy a unit for own stay, renovate it slightly to your likely that would last you for at least 8 years. Thereafter, you may move to newer and smaller projects with some $$$ from enbloc.