Seller only wants cash

[Tereal Wilsonn]

Greetings everyone I hope all is well , here's what's going on , there's a vacant house in a revitalization area in Detroit , I really like it I see the potential in it for cash flow and appreciation it's listed for 140k i made an offer of 115 @ full 203k the sellers comes back with they only want cash , what other strategy can I apply her to get the deal ?