With all due respect to Trulia, don't assume that what you see here is 100% accurate. I'm sure some of the data was innocently entered incorrectly. And it's possible that other listings are not so innocent. Also--though it's probably not applicable to Brooklyn--you have to be sure you understand what you're reading. For instance, a manufactured home might have a monthly payment of $300 to purchase. However, if it's in a park there might also be a land lease/ground rent of $500 or more. So while the listing would be correct that you could buy for $300 a month, your total cost might be $800. (Something like a condo where the PITI might be $2,000 a month, but with an extra condo fee of $700.)
So--always, always verify anything you see.
Hope that helps.