Buffy is available on CDs. I'm sorry to hear the movie isn't up to her talents.
I actually enjoyed The Grudge. It wasn't scary but it was un-nerving and Sarah did just fine in it. Was it the quality of her performances in early BUFFY(S1-3). no, hardly...but the material itself was no where near as strong. It was however the best acting she's done since S5 of BUFFY and before that show found a hole and fell into it(S6-7 were two of the worst seasons of any TV show that I ever seen). Gellar is an acting waiting to show her talents again and break out...a strong performance by this film should hopefully allow her that opportunity.
Seasons 1-6 are. 7 is going to be released in November (moved up from February). A better SMG investment than a pair of Grudge tickets, an overpriced bucket of popcorn and a couple of cokes...