www.beyond-a-century.com has 50g of normal ALA for 14 bucks. Sweet price. I'm gonna be running 1.5g a day to help cut. The price definitely negates it being supposedly inferior. I always noticed better effects from normal ALA anyway since I was taking larger amounts than r-ala for the same price.
I should mention that the 14 buck price is for the powder only. You would have to cap it yourself, so sometimes it's worth spending a little more to have it already capped. I'm a poor college student though, and it's definitely worth it for me when I'm buying 200g