I own a fair few vinyls. Including (but not limited to) Neil Young's "On the Beach" and Don McLean's "American Pie".
I've got a few signed CDs, and I have a CD collection which fills up a shelf unit which is 8 shelves high and 1.5 metres wide.
I haven't properly counted them all, but taking each CD case to be 1 cm thick, that's 150 CDs per shelf, and multiplied by 8 that's 1200 CDs. Taking each CD to be about 40 minutes (I don't have all of them on my computer, because my hard drive died a few months back. Building it back up, bit by bit.), that's 48,000 minutes, or 800 hours, or 33 days and 8 hours.
That's an awful lot of music.
I'm quite proud of that, actually.