All of the online automotive channels. A willingness to look within a 1000 mile radius has served me good. Like the other poster state a willingness to travel can net you a positive but buying used is a gamble period. No way around that. I've traveled far before only to find out the vehicle (motorcycle at the time) wasn't what it was advertised at. I have no idea if it will be worth the paper its written on but I'm paying for a $3300 mechanical breakdown contract. If your vehicle is expensive or hard to service that could be an option. Otherwise skip the extra cost. I just went from central MO down to Dallas TX last month for the Navigator. I engulf myself into OEM brochures & manuals to learn about vehicles I'm interested in. Seems to help understand what to look for too when it comes time to look at it. Obviously, buying local is much easier & may be worth the added cost since there is less travel expense if it doesn't work out.