One of the few reasons I still use ebay and paypal, is for their buyer protection. Yes, it’s sad to see fellow racers rip off one another, but it happens all too frequently.
Always ask for pictures of anything you buy before buying, and pay with paypal. I purchased a “blueprinted” kt100 for $800, turned out it was an airplane kt100 that was in very bad shape. Paypal refunded the entire $800.