Where do you find P3P retail at $800? I thought that was ebay price. Retail of P3P is still $1000.
Amazon has it at $830, but not from an "authorized reseller", though it is "fulfilled by Amazon".
However, expect that to change as the DJI-dictated MAP drops and dealers are able to sell at a lower advertised price.
Either way, point is, a P4 costs the same as a P3P and a P3 Standard together.
Or a P3P, 4 total batteries, and a case/backpack.
And to be clear, I'm not bashing the P4 at all, I think it's a wonderful piece of kit and things like collision avoidance and dual IMU/compass have been a long time coming.
That said, unless you *need* the extra automation/auto-pilot features, it would seem the P3P is a better *value* overall.
Plus, if/when you crash it, you're only out $800 (or less as time goes on) compared to $1,400.