What are problems buying foreclosures?

Buying directly at a legal foreclosure sale is risky and dangerous. It is strictly caveat emptor ("Let the buyer beware").
The process has many disadvantages. There is no financing; you need cash and lots of it. The title needs to be checked before the purchase or the buyer could buy a seriously deficient title. The property's condition is not well known and an interior inspection of the property may not be possible before the sale, says James I. Wiedemer, author of "The Smart Money Guide Bargain Homes, How to Find and Buy Foreclosures," Dearborn Financial Publishing, Chicago, 1994.
In addition, only estate (probate) and foreclosure sales are exempt from some states’ disclosure laws. In both cases, the law protects the seller (usually an heir or financial institution) who has recently acquired the property through adverse circumstances and may have little or no direct information about it.