Just for fun...
In areas with significant Chinese population (18% or higher), addresses ending in the "unlucky" number 4 sell for a lower market value. Source
The best day of the week to list your home is Friday. Source
The acronym FROG stands for Finished Room Over the Garage. Source
The original house-warming gift was, literally, meant to warm your house. (i.e. firewood) Source
Other common house-warming gifts from around the world are honey (symbolizing a sweet life), salt (symbolizing a life full of flavor), candles (symbolizing, well, light), and coins (symbolizing good fortune). Source
In the state of New York, if you are selling a property believed to be haunted you are under legal obligation to disclose that information to prospective buyers. Source