So, you're considering buying a tractor or other piece of farming machinery. Buying it new with the dealer has its advantages, but it can be quite costly. The good news is there are alternatives, and for all budgets. The used tractor market is HUGE and has a lot of choice. There are dealers, brokers, listing websites, auctions and other places to buy from. More and more people are finding what they need at auctions, where there's a large choice available and there is no fixed price. A good deal can be made. But there's also things to be aware about. Here's 6 things to avoid when buying at an auction.