I love how the box set is always on sale but i never really see Serenity drop below $20. And since a lot of reg dvds can be bought well below that price (now with blu-rays coming out the reg dvds are getting much cheaper), i haven't had the urge to pick it up yet.
Also, buffy box sets in stores (are we talking the full one)? I remember when it came out my mom got me one, but seriously about 12 months after the release, i never saw a box set again. They are a rarity, at least in NYC. Angel was around on shelves a lot longer, and even now you can't find it anymore. Just the seperate seasons. I feel lucky to have them.