Yes I agree with your sentiment desporterizer, it's not like these are 1891 Mosin Nagants. IMHO that /30 takes away quite a bit if the rifles value as the vast majority are refurbished rifles. I prefer Finn captured 91/30's as a collector of Mosins myself, but even they have been refurbished to a standard.
I think some how along the way buyers (or sellers) have got the two mixed up. I myself wouldn't be willing to pay a 80 dollar premium for a Russian refurbed Mosin Nagant 91/30, but hey that's just me. If I was a newbie to this hobby I could see how easy it would to be confused that the "hex" version was something more rare or special due to outward physical appearances.