The FN 1922 would be a nice addition to your collection, and being a JMB design, they always run (unless broken or worn out, or the mag is bad). A lot of history with those pieces. Apparently every fourth G.I., Sailor, or Airman in the E.T.O. brought one of these back, too, in their seabags. There are a lot of them around with Kreigsmarine markings, it looks like the German Navy issued them heavily.
The FEG MBP is in the family that includes the PA-63; in fact I think it was the first postwar FEG Walther influenced designs the others were developed from. In my experience the PA-63 is stone reliable out of the box - the MBP should be as well. I think they started making them in '48.
Good candidate for CCW, no collectible value unless you just want to have one of each of the (thankfully) former ComBloc stuff. I've seen no complaints on the boards about the MGP, either.
The CZ-50 is well made but probably requires Euro .32/7.65mm to run. Due to a combination of mag design and apparently a very slight dimensional difference in the cartridge case, like the improved version - the CZ-70.
CZ-70s love Euro .32 but you probably won't even be able to load a full mag of U.S. .32 in them.
With that caveat, both the CZ-50 and CZ-70 are reliable with ball. All I ever shoot in .32 anyway. As with the MGP, good for CCW once thoroughly test fired.
One last precaution - when the CZ-50s were coming in by the shipping container about 12 - 15 years ago, they had a tendency to break firing pins in the shaft - apparently a weakness in the type of metal used. For a while there was an aftermarket replacement firing pin out there because it was a relatively common problem.
I'd see what the guys on the Gunboards Forum Czech forum have to say about the CZ-50, too.
BTW my $200 pawn shop find Beretta 1935, stamped 1941 - which looks like it went through the war for sure externally and has a slightly loose grip - shoots as reliably as anything I've ever owned - NO problems. Like a lot of these older
designs, built to run all day in adverse conditions as the first design priority.