Most of my LP collection, especially the box sets (maudlin of the Well and Strapping Young Lad in particular; those are pretty much flawless boxes). There are a few I'm planning to hawk for cash when the price is right, but only because they're limited coloured LPs that will fetch some asinine prices while the black versions are still available. (Avifauna is already going for something like $70 on Discogs despite the fact that the black version is still available for roughly $25).