A good score would be around 2000. A very good/excellent score would be over 2200.
When I took the PSAT it was when it was still out of 1600, but when I took the SAT it was the first year that it was out of 2400.
Some advice: Practice writing short essays on random topics in under fifteen minutes. If I remember correctly, there are a few essays in the SAT with such a time limit. It definitely boosted my score. I was so thankful the the essays in the GRE give much more time.