I have found a few PR 3 domains that have expired ecently ( a few days) and was thinking of registering them. But I was wondering if they are worth anything? I am currently thinking of setting small wordpress blogs on them and them backlinking to my niche projects. Is that a good idea? Will I get a better ROI if I just sell them? The domains do not have any backlinks or traffic and most of them are not good EMDs.