Is it permissible to buy a company on condition that one pay off its debts?

He bought an apartment on the basis that it would be a certain area (square footage), and it was built larger. Does he have to pay the difference?

He stipulates an additional cost for purchase by installments, separate from the price

Ruling on fixing or maintaining mobile phones and selling them

Is Buying a Car on Installments from a Bank Haram?

Father selling some of his property to one of his sons

The sale was done without witnesses and the seller denies it. Is it permissible to add the names of two witnesses to the contract?

Ruling on selling shares by instalments whilst leaving them in the name of the original owner

“No returns or exchanges on goods sold”

Increasing the price of meat so as to raise some money for the mosque