Box set: Life House box set by the Who. If you like this album, indulge!
Single title: I think it was Kruder & Dorfmeister's 4-disc K&D Sessions. Also up there would be Mike Ness's 2 country albums.
What was the most expensive record that you ever bought ?
Not how much you paid, though we could post this too.
My most expensive record is Japanese pro first pressing of Bitches Brew by Miles Davis. It sounds better than any other pressing, though I don't have US test pressing, which might sound better still. I paid, I think, $170 for it including shipping from Japan.