A property for sale in a public auction has other costs related to its acquisition, backed up taxes and maintenance, possible liens, cannot be seen or inspected unless a few exceptions.
The worse happens when this statistics make it part of the market analysis that trulia offers to buyers and then months later they think they can actually buy anything in real life at the asking price of an auction.
Same thing with realty trac, these properties are not yet on the market and they might not make it. Some of these Los pendens are just people trying to qualify for re-financing.
Trulia is becoming less and less trust worthy for home buyers, we need a site that sticks to real sales. Even some lazy appraisers use their tool to determine market prices totally screwing any chances of buying a property at real prices for those with financing.
A realtor is free for buyers, as your realtor for a market analysis of the kind of property and location of your interest.