NUMBEO worldwide cost of living database?

I don’t know all the details and just stumbled on this recently. I didn’t see a Nicaliving link to it. They claim “655147 prices in 3184 cities entered by 76708 users … as of 02/23/2013”, via “...the world’s largest database of user contributed data about cities and countries worldwide. Numbeo provides current and timely information on world living conditions including cost of living, housing indicators, health care, traffic, crime and pollution.” There are limits to how accurate any cost can be, especially per property, when the two categories seem to be “city center” vs. “outside city center” (in many countries, this doesn’t make much sense as a distinction since wealthy and poor sections of a city are both outside the center and averaging them often yields a mathematically correct but often meaningless number). Unless I am reading the map wrong, it looks like people (members?) have not yet contributed data for places between the North edge of the Yucatan and southern Costa Rica – with Guatemala, El Salvador, Honduras and Nicaragua lacking a major or confirmed entry. Depending on the number of members per country and, of course, their lifestyles, this website could grow into a very useful tool (emphasis on “could”) for crude comparison purposes, though a country-specific site would always win out for more detailed data. See NUMBEO.