Finding Google map coordinates isn't that easy using Google maps itself. If you have an iPhone or iPad download
iBarbados. Then if you hold your finger on the screen for a few seconds a pin will appear which you can move around to place exactly on your property. Clicking the pin will save the coordinates to the clipboard of the device. If you don't have an iPhone or iPad, try this website
http://itouchmap.com/latlong.html, browse around with the controls until you find your property on Barbados. Clicking the map will drop a pin. Clicking the pin will give you the coordinates. Paste them into the box above in the following format "13.173374,-59.548473".