We paid $135 for DS to do EPGY this year - we started late, in October, and that goes through end of May I believe. He started at K lvl and is currently at 3rd grade lvl. I believe it's k-7 and now you can pay extra ($50 I think) for Algebra as well.
We've started working on the language arts/writing but aren't moving too quickly on that one. It seems decent though. Starts at grade 2 and works on nouns, writing complete sentences, finding the main topic of a paragraph, etc.
I do like that on math at least it moves them through fairly quickly if they get it. DS did K in just a few days, 1st in maybe a week, longer on 2nd, and he hasn't done much in 3rd because he just wasn't fully ready for it yet (he's 5) and has just been more motivated for it lately.