If you're interested in BCAA's and money is limited, and you can stand the taste (pretty bad but should be tolerable) I would recommend buying by the kilo.
I get mine from Superior Nutraceuticals.
The Biotest product is much more convenient and more pleasant, but if willing to sacrifice that for cost due to limited total funds for supplements, the powder is cheaper.
Also supplemental BCAA's are I think more subtle or less in effect than some others think. In fact ordinarily I can't tell the difference myself between using them and not: I do so sometimes just out of principle but at least for me personally, in the context of a high protein diet with high quality protein and numerous meals per day, there's not a noticeable difference except seemingly, but not that I'd proved, a small benefit when added to Surge pre-workout. I have noticed a difference when on very low calories and therefore modest protein.
Casein or whey is about 25% BCAA's anyway, by the way, (roughly speaking) so if consuming say 300 or 400 g protein per day, already that's 75-100 g of BCAA's or so. Which is plenty, IMO.
This incidentally is why the old-time protocols of taking just a few grams of BCAA's never did anything for anybody, so far as I can tell.