We once knew a guy who bought a cup of spit which came from the mouth of Skunk Anansie’s Skin. Pretty sure it’s worthless now but if he wanted to check its value, he’d do well to get down to the Hard Rock Café today between 11am and 4pm. They’re teaming up with Bonhams to put on an ‘Antiques Rockshow’ to value customers’ rock memorabilia. To give you an idea of what to expect, we’ve done a bit of our own research. Those in possession of a a signed bar of Michael Jackson-branded chocolate (below) can expect it to fetch £180. If you’ve nicked a bit of seating from The Clash’s 1977 Finsbury Park gig, £120 may come your way. Still got that Led Zeppelin 1980 tour jacket (above)? It could be worth £984. Got 1967 Pink Floyd and The Who posters in mint condition? You’re sitting on £600-£500. Got a signed Keith Moon drumskin? It’s worth £1,020. We bid your fair well.