If the buyer wants to take a loan to purchase the property then it is much easier if he approaches the same bank. Then the lender does not need to release the title papers to another lender before getting the payment.If the buyer wants to make an outright payment- he can make the payment out to the bank directly based on the consent letter. And the balance amount will be paid to you. The property papers will be released only after the bank has recovered the entire amount including prepayment charges.
Just consult with the lender once. They will write a letter mentioning the amount at which the home loan can be considered fully paid off. This amount is inclusive of prepayment charges as applicable and calculated at a future date to give you enough time to find a buyer. Based on this letter, you can negotiate with potential buyers.