I have a bootleg of the listening party where the Sex Sells demos were aired. there's some good stuff, but the sound ain't good at all.
anyway, these songs are not first class songs. there were 11 demos, and many tracks became B-sides for Crush. Just Older, Save The World and I Got The Girl were destined to be on Sex Sells, as Real Life. some of the other songs (Hush, Stay, You Can't Lose At Love...) surfaced as B-sides, but seems to be really close to original demos, so did the band really played and recorded these songs? I don't think so. Jon and Richie are workaholics, so they wrote new stuff for Crush (Richie said about 60 songs during one complete year), rather than using old material. songs that appeared on Crush and that were destined to Sex Sells just fit the mood of the new material, just like Diamond Ring on These Days. it was an old track, but it fit quiet well the mood of this album.
If my memory ain't bad, I think Jon said that these demos would be part of the boxset, but it's not first class material. but after all, it's unreleased stuff, so put it on guys!