Doesn't seem unreasonable. Split a side with my brother-in-law recently and paid just over $3/lb total. Don't think it was grass-fed, but who knows.... I know that I am beef-fed now, so that's what matters.
I'd recommend getting as little of it made into hamburger as possible. Buy hamburger at the store. You'll save the most money (relative to store price) by getting as many roast, steaks, etc made.