Hong Kong businessman Carson Yeung is expected to step up his bid to buy Birmingham during the next few days.
The billionaire, who was unsuccessful in his attempt to take control of Reading, has already had his representatives visit St Andrews and inspect the club's finances.
But they need to be satisfied that such a move would take the club forward and that Yeung and any of his business partners would have the good of the club at heart.
Gold would not comment but a source close to the club said: "David Sullivan has always said he would go if the right offer came but it is not quite the same situation with David Gold.
"It is not as if he would do the deal just for the money and it is not going to be a case of it changing his life if he sells up."
