Reliable Source for comparable market analysis?-help?

[Andrew Kala]

I am new to the investing game and have started looking for deals through craigslist, foreclosures, pre-foreclosures etc, I am also in the process of getting my real estate license in my state. My major question, which seems to be difficult to find a straightforward answer for some reason, is how do I find other properties in a town that are the same square footage and property size to the properties I am interested in which have recently sold? I have looked at sites such a Zillow, trullia, redfin, and realtor.com. However none of these sites allow me to punch in the square footage of the house size I am looking for which has sold recently. Once I get my license I am hoping having access to the MLS may solve this problem? If someone could point me in the right direction it would be highly appreciated. I apologize if this is a very basic question, but I would really appreciate input. Thank you.