It costs more because Tim has to pay Geoff a royalty for the use of his name.
It's the same with ANYTHING that has someone's name on it.
Les Paul must be an absolute millionaire on royalties alone!
Zakk will be making quite a few quid from Gibson, MXR, EMG and Marshall.
It's like the old Nike sponsorship of Michael Jordan, that guy was worth millions of dollars in royalties alone, before you factored in the money he got for playing Basketball.
Look at Beckham, he's making an absolute fortune by promoting various products, and putting his name to all sorts of stuff.