Welcome to the forum, if I hadn't said that before! We
prefer that photos be hosted on this site, for the reason that many times the photos are overused and timed out or the owner deletes them. You can post here one at a time in each post, or you can use upper right and post many, as you did.
A byf42 is popular with folks who want a WW2 luger, so it fits the bill. I can not tell from the photo's if it has been reblued. If it has, then yes, you paid too much, but not incredibly. If bot reblued and all matching, you got a hell of a deal.
Aldo, if the holster is not messed with (i.e. cut down) and in good shape and it is included in the $800, then no matter what, you got a good deal! A nice holster (brown is worth more) goes for at least $150 and many times even more.
Ed