I use to teach for Kaplan (SAT, not GRE, but they are really quite similar) and my opinion is that with your scores, you shouldn't shell out the money for the class. Your verbal score is too high to benefit from their very basic instructions. Maybe some of the math strategies could help - but in my experience, all of the strategies they will teach you in a $900 classroom course can be found in the $30 prep book they sell in the bookstore. If you are missing some basic math concepts or need a refresher, then the class may be worth it. But if you remember the math and it's just the WAY they answer the questions that is messing you up, take a pass.
Also, I scored a 6 and I'd be embarrassed for anyone to see the essay I wrote for the GRE and assume that was the way I actually wrote.
Thanks, Juillet. I ordered a book and will go through that and probably re-sit the test sometime in October. I assumed I can get a decent bump by studying this time or even just by sitting the exam for a second time and knowing what I'm getting into. I also had the flu at the first retake, which shouldn't probably have hurt my score, but makes for a nice ego saving/confidence boosting excuse for me.