From what I had learned…Few dealers seem to have the ST12 and Yuneec sells them direct to users for around $550….Meanwhile, check Ebay or the Classified here for the ST16 (new) for less then $475. OR buy one from a dealer for $599. I figured two ST16s give you options (read: BACKUP) at a better price point unless you can find at ST12 for less then $475.