So what happened with the "DAO" 4566TSW?
John?
I met the seller on Tuesday, as planned. We spoke at some length, and I gave it a decent inspection. Field stripped it, everything looked fine. The hammer does reset with just a very small (1/4 in.?) movement of the slide, and then upon trigger reset, the hammer can be tripped again.
The dings in the surface of the slide, from having been dropped, were considerably less significant that they appeared in the flash photography...as I suspected might be the case. The magazine safety still functions (not that I've ever been a huge fan of mag safeties, but I find some relief in it's being intact, as it having been removed would, to my mind, be more indicative of some sort of "bubba"-esque type of home gunsmithing!), and everything seemed to operate as it should. So...I bought it.
I also picked up the 442, for anyone who's interested.
I didn't post right away, because I figured it would be more meaningful if I had shot it before posting. But, given the current situation...who knows when that might be?
Thanks very, *very* much to all who posted here, with answers and advice for me. I really appreciate the kind assistance. When I do finally get around to going shooting again, I will definitely post the results here. Hopefully, I'll also be able to finally put some rounds through the "new to me" 4506-1 and 469 that I've had for a while now, and report on them, as well!