What country are you in? Never heard of realestate.com and it doesn't even come up on Google.

Is the problem with the word "listing"? Would it be more accurate if I say "the webpage you look at when a house is for sale"?

Thanks for your edit. (And for editing the URL to add the .au). It turns out it's not a website difference -- it's a COUNTRY difference. I apologize for not realizing you were not familiar with how the US real estate market works.

It's wrong for me to be US-centric, but it's incredibly bizarre for you to assume that Australia is the country we're all talking about.