I'm sorry to say that Realtytrac played a dirty trick on you. This property isn't listed on the market.....there isn't even a unit number for it on their posting. Realtytrac is notorious for posting properties as foreclosures when more than 50% of the time they aren't that far into the process, or the owner may have only defaulted on a payment or two.
If you have any questions about foreclosures, Jesse gave some great advice.
Best of luck,