I studied google checkout for my fathers website. He's only selling a couple of books. No plans for any more products either.

From what I read at google checkout (I spend probably a full day reading everything there was to know about them, and to understand COMPLETELY what they were about) is that in order to use their free service, you can only sell one item per customer. In other words, a customer can only order one product at a time. So in order to integrate it with my father's website, people would either have to call to order multiple books, or go through the checkout process again. You can use their merchant affiliates to setup shopping carts on your websites, but then again, why not just use their services anyways?

For the rest of this year (2007), google is allowing everyone to use googlecheckout for FREE. After that, it's $2 per and 0.2% of each sale. Except that's not all. The whole googlecheckout thing is to promote their adwords program. Every $1 you spend on adwords, you can process up to $10 of orders for free. So expand on that, every $1000 of adwords you spend, you get up to $10,000 of order process's for free. After that, they get the $2 and .2% of each sale.

So if you calculate it out and really want to spend the time to use googlecheckout, it can be worth it. It's meant to promote their entire adwords (and froogle) program. I personaly just bought an online shopping cart for my father's website. Much easy process than dealing with google. Plus, it cuts out the middleman.