Emily was microchipped by the breeder before we bought her because in Canada for a dog to be sold as a purebred it has to be registered and to register a dog it needs to be identifyable either by a microchip or a tattoo.
I got Clipse microchipped when I got him and it was around $20 but I was working in a vet clinic at the time so I know I didn't pay whatever they'd normally charge.

binka_nugget:
You don't need Kai to be put under to have him chipped. You can just save up enough money and get it done at his next vet appointment