While on the vinyl thing, I think the main thing that's boosted it all is Jack White's entire enterprise, he really is milking vinyl for all it's worth, and I've been hopelessly following that trend. I, for one, got my first vinyl record + record player Christmas 2011, I now own over 70 records all of which I've bought. I still buy CD's, but it just isn't the same to me, there's something special with vinyl to me, but at the same time, I download or record all the records I have to mp3's for when I walk to school, so I utilize them in every way.
Speaking about how expensive vinyl gets on ebay, JW's stuff clearly does very well considering I remember that record store day about a year ago, he released his special liquid filled vinyl and immediately it popped up on ebay and was sold for a few thousand. I love vinyl, but would never go over $100 unless I was getting several, no matter how rare or special it was.