Few things I learned about house buying is that, if possible, all should be written or there is an existing trail. It is not enough to get an approval, agreement etc orally because people have weak memory and misunderstanding happens due to speech, tone, grammar, lack of attention span etc.
If you are dealing with a broker, it is still best to know the seller personally, visit his/her house, get his/her contact details because while processing the transfer, building permits, construction agreements and/or paying the taxes you will probably need the assistance of the owners.
One of the thing you need to be sure of before paying is to have all fees in writing that are still unpaid and it should be stated therein that other fees that are not there but are chargeable prior to sale date must be paid by the seller.
Fees like association dues, property tax, surveying, utilities etc must be declared or paid.
Normally buyers mainly focus on the TCT, and Real Prop taxes and when all has been paid the buyer can be surprised with other unpaid dues on the property. Of course, you have to call the broker but since brokers are paid already and the sale has been closed, the buyer now has to wait to be prioritized by the broker. After the commission brokers are not too keen on meeting, discussing with you. There demeanor will even change after the sale, before the sale they will call you Sir/Ma’am and will be respectful. on time, helpful, always available etc… but after a sale they can act busy, slow to your requests, tardy…
Same with the seller, they can act similar to the brokers after a sale which is a natural reaction as they dont have anymore incentive to do the extra work. .