I don't know the total but I heard that when they were in full production they were producing (and selling) 20,000 units a month. Times that by about a year or so, I think the number is somewhere around a quarter million or so. totally guessing. I looked into this because I was getting discouraged from reading about all the fly aways. I eventually figured out that the forums are full of negativity, people only come here if they have a problem. You never hear from the thousands of satisfied owners that have zero problems and zero reasons to look for a forum. I think the fly aways are about 1/10th or 1/100th of 1 percent of units sold. I felt better.
I bought my P2V+ in March 2015. Next month they announced the P3. haha story of my life. But I think I have the latest and greatest version with all the upgrades and tweaks, the vented wi fi box, the globs of goo on the motor wires, the gps shielding, etc.