If, furthermore, you happen to have found £100 in an even older pair of jeans, it’ll buy you a signed and very, very pretty Faber Members (pfffft) edition of Orhan Pamuk’s My Name Is Red.
Found £50 in an old pair of trousers? That’ll get you a trippy Faber Members (childish snort) edition of The Bell Jar complete with delicious endpapers.