I don't know yamaha's like I do CBR, VFR, or 636's so I don't know if my usual guidelines can work or not. What I'd be looking for is a generation or two old, under 12k miles and $4500 or less. If you can find something fitting those parameters, there is a good chance you can at minimum break even. I've always found ones with cosmetic issues I could use to pay less for the bike then fix them on the cheap so you can sell at a higher price because its now nicer