I know it's been a few months, but I wanted to add a "Me, too!" on this.
(I've brought it up on this thread:
viewtopic.php?f=7&t=26405)
I just bought a "Complete set" of WKRP from eBay for about $30 or so. (Amazon is about $80 now, for a complete set and it appears to be the same set as what I bought.) My UPC (on the bar code) is 2666315304. There are 4 boxes in it, one for each season, with 3 discs per season - plus a thin package bonus.
The quality is poor and, on Disc 3 of Season 1, I'm already having more trouble with this than I have with, on average, 5-6 TV shows when I rip them to my media server. On Season 1, Disc 1, Episode 2 would simply not rip. Episode 8 always ripped to a 0B length file. I haven't looked closely at the episodes from Disc 2, but at least one didn't rip properly. It's ripping Disc 3 (still on Season 1) and it's taking a long time to rip that DVD - it's run into some glitches.
At this point, I'm thinking of returning this set and replacing it with another, but I have the same issue that's been brought up: There's just no way of knowing that if I get a new set, it'll be good. It may seem silly, but I like to buy actual DVDs and copy them (for several reasons, including archival), then store the DVD. I don't put my files up for trading or sharing. I also don't like downloading stuff. If I want it, I buy it. But, at this point, it looks like I can't get copies of 3 episodes on the first 2 discs at this point.
I'm going to see what the rest of the set is like. I've noticed that often it's the first or last disc in a series that's seriously messed up and others are okay. Maybe that's just coincidence, though.