When you consider the aforementioned $10 USD for 10 hours, and the fact that Guru.com takes 7-15% of the fee, it's practically free.. :)

What would be the motivation to code a product for someone else for free? Especially considering they might profit off of it, or that you will likely hand over the rights to it afterwards. I'll admit that I am interested in coding fun projects, but that's questionable.