If you're interested in foreclosures give me a call. I think the easiest way to pick them up is after the auction when they come back as REOs. You may also be able to pick up properties as short sales. There are also many free resources on my website under the foreclosure link.
I think it's a waste of your money but if you want to spend it to surf...
My advice is to work with a Realtor that knows the area you are looking to invest in, being Plano or Richardson or whatever. We can research homes that are actually for sale and available and it doesn't cost you anything.
If you are not represented, I will be very happy to assist you in your search. Keep in mind that not every foreclosure is necessarily a good deal either.
I have not heard a lot of positive feedback about Realty Trac. If you look at their listings here on Trulia, many of them are old or no longer available.
My office actually has a full time team which specializes in foreclosure properties and teaming with investors here in Travis County. It's not necessarily your market area, but I think it is a great place to start and get more information and it won't cost you anything. I don't know if there is anything quite like this in Dallas.
Visit the weblink below, then contact my Broker, Peter Sajovich. You can let him know that I referred you. He is very knowledgeable in this area and his investor model is second to none. Perhaps you may end up investing here in Austin.
Please contact me if you have further questions and good luck.