how to get make offer on owner finance deal when seller is afraid of due on sale clause

[Troy Michaels]

120000 asking price with 40000 down is what seller wants. the 40000 is the payoff on owner note with his bank . ok, how can i work this so that the seller will do the deal without me paying off his note ? he only wanted tthe 40000 down because he is afraid of the due on sale clause on his note . otherwise , he will carry a owner finance deal with me.