How to Weed out the tire kickers

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I have a great new home under contract that has a wonderful ROI. Asking is 78k with only 10k worth of work to be done. Seller is a contractor but fell ill so cant finish the job. Title free and clear and ARV is 130k. The problem Im having is that there are alot of tire kickers requesting the address before asking any questions about the property. The numbers are really good and its a potential 40 to 50k profit if resold after a fix and flip. Or could be a great rental property. Its in a smaller town with quiet country roads. I thought buyers would be jumping at this deal but instead i have been getting non serious inquiries or just looky loos. Any advice on how I can weed out the bad apples quickly???