Hi Gaucho:
In my opinion, the main reasons to buy from a local dive shop are 1) you can support the local dive business/club/friends and 2) it is somewhere you can take equipments in to be serviced. However, if you are a global person whose permanent home changes every so often, you might as well order it from the internet. A good site with good price and selection is
www.leisure-pro.com . No tax too!
-Ken