I agree with your comments, except I wouldn't object to $30.00 or even $50.00 for a perfect digital copy of the master file.
Unfortunately, the "master tapes" are not always that great. Lets face it, you can only use up so much studio time and session musicians or a band may have just a week with the studio rented (often at night if they can't afford it). With classical it is even worse - you may only have a couple of days to get everything you need and live is the absolute worst - you maybe get as much as three inadequate recordings in a venue to work with.
The reality is that if the band is serious about audiophile quality sound then you generally get it - INXS, Pink Floyd, Bryan Ferry, Roxy Music, Mark Knopfler, The Eagles, Tom Petty, Toto and many others pay great attention to sound quality coming out on their studio releases (and hire the best of the best). However, those who take such care - re-dub things and if necessary and spend extra money to go back to the studio or go to several studios and do extra takes - these musicians are in a great minority. Unless you have such stubborn musicians that stand up to the producer and push for a great recording then a great recording is often simply a one off stroke of luck!!
Poor master tapes can be cleaned up - but you can't turn a sow's ear into a silk purse!