Not to be contrary, but I always felt the M4-P was the one 'no thanks' body in the whole pantheon of M bodies. It's the worst of both worlds, IMO. No meter, like the old bodies, but with the inferior finder and lower quality finish work of the newer bodies. A clean M6 can be hand for a couple hundred more, OR you could have a really nice M2 or M3 for the same price. If you gotta have the 28mm finder, I guess it is the cheapest option, though.
I agree with the other posters that the M4-2 is the true bargain of the M world. I heard all the internet fear-mongering about this camera, but I received one in a trade and liked it so much I kept it in my wedding bag for a year before I traded 'up' for a TTL. Reliable as a brick. It has the clean 35/135-50-90 finder, vulcanite, and rapid loading, too. And they can be had for perhaps a couple hundred less than the M4-P with careful shopping.
As others mentioned, the vintage bodies - the M3, M2, M4 and M5 - really are something special. Not that the new cameras are bad, not at all, but you can almost sense twenty technicians in white lab coats building the old ones. They really DON'T build 'em like that anymore. Even Leica....🙂