Depends on series (production year => when would be the next service) of the watch, and if you are getting that from a reputable watch store trade in (which they will back up the authenticity of the watch), it seems to be quite a decent deal.
White dial PAM is not for every one, but they are more "unusual" (think white dial Rolex sports watch vs. the black dial ones). I love mine for the lower number of production, more rare in the wild (not that PAM is that common to begin with, certainly less seen than Rolex Sub and DJ), and it has now been discontinued.
If you like them less common, then white dial PAM is a good choice. One thing though, white dial 44mm Luminor certainly has less lume material on the dial, hence it won't have the good lume you hear about Panerai. That doesn't bother me though, just buyer beware. :)
Here's my 114
For the days that I perfer good lume, I just go with 000 :)
