I've spotted a nice WordPress (GPL) theme for sale.

I know somebody who bought it.

I have 2 questions:


Has the company selling it the obligation to send the source code to whoever (customers or not) ask it?
Can the person who bought it give me a copy for free which I could use in production?



The company selling it has no obligation to distribute source to anyone except people to whom they have given binaries. So no, they don't have to give you anything.
Someone who has purchased GPL software does have the right to request source and subsequently redistribute that source to anyone under the terms of the GPL. If you can find a customer willing to give you a copy, that will work.
