I have looked around and must have missed this thread? I love my MPP and wish to explore FPV. I have no intention of up grading my mavic as this one is perfect for me. Would love to know what is the best option for an old bird?
You might find new ones somewhere local, not sure where you are.
Here it would be impossible to find new DJI white or RE . . . in the US, there may be some new around.
The Yuneec are cheaper, but supposedly quite good.
Some use the phone ones purely to get a cheap taste of FPV with goggles (they're around $15 - $20 only).
Many find the sensation less than they expected, when starting with them you can actually feel a bit air sick, some need to sit for a few flights as they get used to them.
They are great for letting another person wear them for the pilot seat experience, while you fly.
I have the M1P and also have no plans to upgrade as yet, there's just something about them those first DJI models (I have a Spark too).