I just checked one of my sources for a new gps 12. They no longer listed the GPS12. I checked the Garmin page to look at it's features. It does not offer much more then the basic etrex, except garmin claims it has good reception under trees. Maybe that is the reason. Or maybe it's larger screen?
Recent ads for more advance Etrex models are showing a steep drop in price. In my opinion the gps 12 might be a value around $50 for a low price Christmas present. This is not knocking it as a unit, but as a discontinue/or soon to be discontinue model. The manufacture's recommend price is more then twice the price of the basic Etrex.