On tenure, respondents should use precise wording rather than just saying “owned.” The OP needs to understand whether the offer concerns a standalone property, a unit within a shared scheme, or some other arrangement, along with any shared maintenance context relevant to condition.
There is another representativeness issue: mostly new-build flats at these prices will not describe Johannesburg property generally. Houses, older flats and lower-priced stock could behave differently, so comparisons outside this segment may mislead.
Does the ZAR 782,600 already exclude the first mortgage payment and every cost due around transfer, or are some still estimates? Also, what would your monthly spending be after purchase? The cash figure alone is hard to assess without knowing how many months it would support if income were...
I disagree that 28 days itself creates much leverage. Days on market can be distorted by withdrawn and relisted stock, so the public listing may not show the full marketing period. Look for the original listing date, any gaps, and price cuts. Seller motivation matters more: an owner with no...