With a little bit of effort and a buddy or two you can get grass fed beef WAY cheaper than the regular prices listed on that site.
Look for ranches that raise the cows in your area where you can buy the whole cow and then have it processed into the cuts that you want. Here in Central Cali we have ranchers like Miller Ranch. You can split the cow with a another family or two and the ranchers will even try to pair you up with other buyers if you don't have someone to split it with.
There is no obvious pricing since it depends on the size of the animal and how you have the meat packaged. You also pay a flat rate across all cuts rather than a higher price for premium cuts. The overall price is way below that of boutique sellers and can even beat grocery store pricing on hormone and grain fed beef. $3-$5/lb.
http://www.millerranchenterprises.com/faqs
Anyone here want to split a cow?