That is too much to pay, but I wouldn't be surprised if that's what they go for all over in a few years. I got mine for $199 with the same package. It's an excellent rifle, probably *worth* about $1,500 if it were re-built today. I'm not sure why they're trying to sell this as a historical rifle, unless it's one used by the Bosnians with the Bosnian fleur on it.
If you want a historical rifle to hang on the wall or march around in an SS costume with, do not get this rifle. If you want to actually go out and use an unissued Mauser, this is the rifle for you. I've taken mine through some rough country, and it's held up very well.
In other words, this is not the sort of rifle for a "rifle NAZI" ;-) It's a rifle for people who buy rifles to use them, not to look at them or admire their racial purity.