I think this depends on which university you're applying to. For the GRE verbal, I think a minimum score would be 650, and I've seen it as a non-official cut-off in some programs, however, some universities also consider the percentile rank, which should be 90% or higher, and the score that corresponds with this depends on the others who took the test. The reason it should be this high is because most test takers go for a high Q score and don't care if they get an average V score, since they are applying to science or econ programs etc. This pulls down the average a bit.
I think the same score and higher would be good for the GRE general, 650 would put you in the 89th percentile (depending on the competition of course). If you're aiming for a highly ranked university, you should keep in mind that somewhere between 4 and 10 students will be admitted every year, so you'll need to score in the 99th percentile (maybe 95th will be enough) if you're aiming for a top 5/top 10 school. Again, these are just estimates, no score will automatically grant you admission, just as no score will automatically exclude you. Luckily all of those years of studying you've done before still matter and will be taken into account.
