which 아니메 do 당신 think i should buy?

Well, on Amazon, Skip Beat is about $50 while Ouran is on sale for $35, and The blu-ray version is on sale for $25. However, it depends on which one 당신 want the most, so we can't choose that for you. I would recommend buying your 가장 좋아하는 if 당신 have the money. Otherwise buy the cheaper one for now and save up for the other. I'm assuming you've seen them both. If 당신 haven't though then just look at the genres and summary of both shows and try to figure out witch show is 더 많이 suited to your taste.