Curious where to find the cheapest green tea extract? The cheapest is generally not the best way to go in supplements but it is a good way to go if you're not ready to commit your bucks to the top dollar best brand. Currently you can find green tea extract by Spring Valley at Walmart for as low as 2.99 a bottle. This may be a good option for someone on a budget with his supplements.A better option may be a vitamin store brand version of green tea extract or any supplement such as GNC's brand or Vitamin Shoppe's brand. These brands usually follow higher standards and are more consistent. As always do a little research on your supplement company before your next purchase. Online reviews on Amazon and other sites can clue you into what is worth your money and what isn't.