Ezydvd are having a sale in October. They are selling all current seasons of Buffy and Angel at $59 for a complete season. I don't have Buffy s7 or Angel s4 on DVD yet, so I thing this is my opportunity to get them cheap. The catch is that they are in one case rather than three. I'm ok with that.
I have been fortunate with the DVD's I have. For the 17 packs I have, I think they cost me less than $50 per pack.
Wow, that's the first time I've thought of them as a whole. That's a lot of money...
They are worth it.