You can own a gorgeous used Yamaha Dt 175 at a bargain price.
You can either buy a used motorbike based on a hunch, hoping for the best, or you can go out there armed with the kind of information that guarantees the best possible deal.
Is there something wrong with them?
When you have the right information, you can find great deals.
If you don't have good answers to that question, you need more information before making a major purchase.