What is the Kelly Blue book TRADE IN value? It's free on line. A trade in is almost worthless anyway so base your # on that. Go to stadium Yamaha parts, and look up the Cylinder/head/piston kit, and subtract those. DON"T tell a buyer your Liars quote of four hundred. Just give the retail parts price, and let them figure how to have them installed. Most people looking to buy a dead scoot will be doing their own work anyway.