I like to post this method here, some of the newbies like me here love to do this method of flipping the domain and websites, Just getting them at the low cost.
PR 1 and 2 are not what you want, you want 3 or 4 as a minimum, and higher would be nice (but getting really expensive), but there are other factors on any domain name that matter just as much as the PR
The name and keywords is always a critical factor. I recently flipped a three word insurance-related domain with no PR at all.