The difference between the vepr and the svd os a stronger, beefier bolt type, and Molot is known to make fine quality barrels. If you poke around the forums, you'll see folks with stock Molot VEPR's pulling 1.5-2moa, but, it is the internet, but I don't see why not. Ad for stamped or milled, not sure, looks stamped.
If your a collector and want something that's going to a very desired piece one day in your lifetime, find a druganov. But for a shooter, I can only imagaine that a company with a good rep for accurate quality barrels will be a better choice for the range, at about half the price. If only an svd shot as good as they do on call of duty.....
Never thought about the plastic mags, something to think about though. I would probably buy a couple that never got opened, but still as you said, they prob wouldn't be worth a dang a hundred years from now. But I suspect if you really really needed a mag 20 years from now,youll likely be able to quickly scan an original and print one out....unless they ban those evil printers.