The price that Chris found them at is still good. rFactor 1 is still a good sim lots of content for it. I probably won't buy 2 until more content is released for it. It is not worth the the price at this time.
I was lucky in Canada to find rFactor for $4.99. This was last year.
It was so cheap that i bought one for a friend of mine. Mission is about 1hr drive from where i live but this was the only place in all of the Lower Mainland that had rFactor in stock.These were the only two copies left.