Even filtering all the R51 YouTube videos through the usual troll/BS filter, I still believe these pistols have too many issues. Whether its backed out frame pins, poor tolerances/machining, cheap magazines, or a combination of problems. Even if I got a "good" example, I would have to put $50-75 worth of ammo through it before I could trust it enough for serious defense duty, so add that to the cost of the pistol.
Then, even if I obtained a reliable R51, there's the long-term wear concern. The steel locking blocks appear to badly batter the frame and the "elastomeric" extractor tension ball does nothing to inspire confidence.
I have an original Model 51 and I REALLY REALLY wanted this gun! I still want an R53 .45- but in all steel with a real spring for the #%@ extractor. Remington could turn their very hard won experience with this pistol to good use.....and profit. I would gladly fork over $750 for an R53.
But they probably wont go there.
If I could get one for $200 and had space in my safe for an unreliable oddity that I would rarely shoot, sure. But I can't and I don't.