A cheque made out by John Lennon to the Inland revenue for £6,946 has sold for £2,000 at auction, so it sort of has sold for less than it's worth, if you see what I mean. In reality, of course, it is just a piece of paper, and £2k for a piece of paper seems like a lot of money to me.
Anyway, the cheque was previously owned by once-notorious former madam Lindi St Clair, aka Miss Whiplash, who purchased the item for £4k back in 1998. St Clair said she didn't mind making a loss on it, saying "I had my fun with it when I bought it. Nowadays it's a nuisance having to keep it safe."