Handshake Deal on Land Sale — Seller Backed Out, Do I Have a Case?

Looking for advice on this situation. Handshake Deal on Land Sale - Seller Backed Out, Do I Have a Case?

Details: I'm in a situation where I need to understand my legal options. Has anyone dealt with something similar?

Update: Thanks everyone for the guidance. I consulted with an attorney and we're moving forward. The advice here helped me understand what questions to ask and what to expect. Will update when there's a resolution.