A buyer's fee is common in purchasing land because of the way the interest rate is calculated. It was once difficult to figure out how much interest a particular home was going to be paying before a sale was happening. But as we know, land is much harder to sell, especially if you've taken the time to change the entire property to one that's a better fit for your lifestyle.

Even before the DFW auction homes have been built, there's a seller's fee involved. Basically, it costs the seller a percentage of the price of the home. They want to recoup their money before selling.