The information provided by "It's Easy" is correct. Congratulations on discovering how the Homeadvisor site works!

If you want to use this information source to do the project, that is fine. In this case, you should also pull maps from Yahoo and some interesting relevant information of your choice from an HTML source. Your project should demonstrate that you know how to do simple information extraction from HTML using regular expressions.

If a house was last sold before 1996, it is ok that you don't have the sale price for it. Your recent comparable sale should always be from 2000 or 2001, and should have a known sale price.

The Microsoft Homeadvisor site is an example of what not to do in web site design, for at least four reasons:

(1) It does not work properly in Netscape browsers. (This may be deliberate Microsoft policy, for anti-competitive reasons.)
(2) It is slow. In comparison, the basic GET operation from the server 63.78.183.70 is very fast.
(3) The combination of server-side generated Javascript with style sheets and basic HTML is bad software engineering: tricky programming, with no clearly visible benefit. For example, house info should be packaged as XML, not Javascript.
(4) Security is very weak. A determined programmer could take much more information from the server 63.78.183.70/CICS/CWBA than the owners of this data would want to release.

CICS is IBM software that is over 30 years old that manages information transactions over a wide-area network. CWBA is the CICS web interface software that allows "legacy" CICS software to be used with web sites. For more info on CICS see http://www-4.ibm.com/software/ts/cics/