yes exactly what gr8 said But i think pr 7 is quite possible. But considering as google is not updating i don't know how much long you would have to wait
pr 8 or pr 9 having any number of outbound links you get nice pr but the less the out bound links more pr you get
make sure the page that put you on has less than 25 backlinks on it and you should be looking at possibly a pr5, if you have the money to buy a permanent link from such sites.