I think $30-$35 is $5-$10 too high for just the clips.
For $35-$40 look at all the quality hardover books I can get shipped directly to my home.
The video clips are a nice supplement, but they're just that, a supplement. While they'd be quite nice to have, I figure if I've bought Vol's 1-2 in hardcover, I've already spent $60 and it's not hard to justify $25 for an add-on (the clips). But once it goes much beyond that, you're competing with the purchase of an all new (and nice) hardcover book ($30-$40) vs. a simple cd with some clips (which are useless to anyone who hasn't already forked over the cash for the hardcopy editions).
Right now, it would cost me $90 to buy both e-books from www.lybrary.com
just to get the clips. Seeing as I already own those two volumes, I can't justify essentially re-buying the two books just for the supplemental material.
The premium charged for the e-books makes sense in light of the seamless integration of clips and book. While those owning the hardcover can use an nicely indexed cd, it'll never be as convenient as owning the two e-books (for $90).
In short, for $25, this clip package would likely be something I'd want to purchase, but for $30-$35, I'd pass and simply buy a nice Kaufman & Company book or a nice used book on e-bay for a similar price point.