I've got one of each -- an S/42 shooter (which was one of the many refinished guns imported from the Eastern Bloc), and a 42 collectible. At least ONE of them wasn't a commercial model.
I think you'll find that the 42s, in good (collectible) shape are getting a bit more pricey, nowadays. Mine is on consignment at Cherry's (they focus on fine collectibles) in Greensboro, NC. We're asking (and expect to get) $1100.
(Although it doesn't look it in the photo, its very crisp with little wear. The lighting they use when they take their photos makes the gun look somewhat worn. It isn't. Dark bluing. So dark, in fact, that their Luger expert suspected it had been reblued. Crisp original, serial numbered grips, etc. One mag matches, but it looks to be accident; the number is right, but its the wrong type of mag for this particular gun. Not import marked; a WWII bringback bought from a neighbor, who cousin gave it to him. He died several years ago, before I was into C&R guns, or I would have tried to get documentation from him.)
Here's a link:
http://www.cherrys.com/stokpics/1shr.jpg
After you've viewed it, delete everything to the right of ".com" and look at Cherry's other guns.