I agreed to sell a domain to a buyer for mid $xx,xxx some months ago. Initially the buyer only offered low $xx,xxx for outright purchase. This domain is related to the marijuana market and so with legislative changes coming into force I agreed to lease the domain in exchange for the buyer signing a Domain Purchase Agreement for the full amount to be paid in summer 2019. My circumstances have since changed - I am retired and would prefer to simplify my finances. I don't think asking the buyer to change terms is a good strategy. Is it possible to transfer the rights of the Domain Purchase Agreement to a third party - to absorb the risk of the seller not following the obligations and how should I price such an arrangement?