网上建议，卖家可以加上以下内容。请各位看看是否可以有更好的说法？谢谢！

Seller is aware that buyer intends to perform an IRC Section 1031 tax-deferred exchange. Buyer requests seller’s cooperation in such an exchange and agrees to hold Seller harmless from any and all claims, costs, liabilities, or delays in time resulting from such an exchange. Seller agrees to an assignment of this purchase and sale agreement to a qualified intermediary by the buyer