Ok. No offense guys. I really had/have no idea. To you its apparent. When I hear Mauser I tend to think 'old military action' beater or cheap action to do a build on. I'll research now. It's a world I had/have no clue on.
The Mauser name has a certain panache to it in some peoples eyes, as you can probably tell by this thread. That said, so does a 57 Chevy and Special K. If someone likes it and decides to 'build' on one then you can get to 3500$ quickly. Rebarrel, restock, pay a gunsmith 80-150$s an hour and you can get an expensive rifle in no time. If it is a built custom, than truthfully the Mauser name means nothing, other than the panache (I have a Mauser, oooooh check it out, you have a Remmy 700....ewwwwww). You can achieve the same results and costs on any makers action (ie chevy, ford, VW), but brand loyalty and fixation mean alot to some people.
If its an original gun, say a commercial hunting model rather than some beat up military surplus klunker, then again you have a 'legend' affect, like pre-64 Winchesters, where people will pay extra for the name and legend. Alot of US gun writers hyped the old Mausers as the rifle to be had when going on safari etc, and 70 years of that has created this mythical status, as well as the never ending CRF debate.
Mauser has a huge 'legend' attached to it, and the 98 more so. Most people who will blather on about Mauser being the epitome of rifles cant name 5 other Mauser models, or tell you why a 98 is better than a 95, or 66 for example. In reality you arent missing anything, other than as with all consumer products, some take on a legendary status where people will pay more for the name, than they will for the exact same product if it had someone elses name on it.