A teeny hint to London Guildhall University as it hunts for spare funds down the back of the sofa. Forget about the silk ties and ballpoint pens that most universities sell to raise cash. The University of Arizona has revealed a far more lucrative possibility that is also guaranteed to enhance academic prestige. It has depicted itself in a thousand-piece jigsaw, showing the football stadium, the observatory and other campus high points. Yours for $15.