So Sonny Bill Williams is off to Japan because of a handshake deal.
Curious that he honours such casual contractual obligations, but had no qualms about breaking the contract he had with the Canterbury Bulldogs league side before heading to France to play rugby.
Williams is New Zealand's first professional rugby player who actually understands the value - and limited investment term - of his main commodity, his body.
It won't last forever - Williams is simply accumulating the maximum amount of money he can before his body devalues.
His CV now reads "All Black - 2011 World Cup winner", his price has been ramped up considerably and he's off.