You make a good point, of course; and yes, I do often buy at thrift or pawn. But my answer is still "yes", and here's why:$9.99 per movie is a best deal? ?
I buy used movies at the local thrift store. $1 each.
Most used movie sources (thrift stores, pawn shops, etc) don't guarantee the movies, or they charge more to give a guarantee. So if you get them home and they don't work (or they have a completely different movie on them, which happened to me once), you have no recourse. Except to use it as a coaster or just throw it away.
I've only had one "new" movie fail to rip. A quick exchange, and that problem was over with. But I have had numerous used discs fail from thrift and pawn.
Edit: Oh yeah, and finally, most used movies come with the "Movies Anywhere" code missing or already impinged. Meaning that you can't register it because somebody else already registered it.