I kind of have lost track of the number of F2s I have...and even bought one from the classifieds here last week.
Offhand, I think I have
1x DE-1
3x DP-1
1x DP-2
1x DP-3
2x DP-11
1x DP-12
My cheapest one was my first one-a niceish one in chrome with a DP-1 and it set me back all of $50 or $75 from a local shop. My most expensive was the near perfect '80 SN with DP-12(F2AS) and MD-2 that was $500 at the same shop.
All of mine are functional. I do have one(actually the one that came with the DP-3) that won't reliably power a meter-I understand that broken wires in the battery chamber are somewhat common. The DE-1 I have actually came to me on an F(I bought it mostly for the prism, and fitted an FTN to that F), so I just stuck the DE-1 on the one with battery issues and cycled the DP-3 onto a DP-1-equipped camera. The spare DP-1 then ended up on another camera I bought that came with a dead finder. I also have a couple of late ones that make sort of a "whir" when advancing the film, but as best as I can tell this doesn't impact the operation of the camera.
I have found DP-1s and DP-11s to be a bit more prone to jumpy needles and often being off 1-2 stops. The DP-3 and DP-12 seem to always be dead-on, and you can of course read the display easily in any light(I have a DL-1, which is an accessory light to illuminate the meter read-out of the DP-1 and DP-11, but these aren't common). All said and done, I don't know that there's a better camera for coupled metering with non-AI lenses than an F2SB(DP-3). The Nikkormat EL is close, but I don't like having to set the lens to f/5.6 before mounting it on any of the non-AI Nikkormats.
I've never heard of this alleged shutter "ping"-and aside from meter issues mine just keep ticking away.
I am on Sover Wong's waiting list, and should hopefully come up some time this summer. I need to carefully decide which I'm going to send, as I can't afford to send them all but this may be the only chance I get.
I guess my point, though, is that they're out there. My last was $200 with an MD-2 on it.