Discounted Loan Payoff, Hard No

I recently did a commercial closing where the seller, my client, took back a promissory note and mortgage for part of the sales price, secured by the real estate and business assets sold to the buyer.  The note had a market interest rate, twenty-year term, five-year balloon.  The buyer offered to pay off the mortgage, but a a discounted amount, not the current principal balance.  Nice try, thanks but no thanks, keep making the monthly payments.

Mitch