depends on the mg dosage, if they are time released. i love adderal, i think it is the closest thing to XTC that you can get for that price, and that is legal. Personally, i dont think id pay 50$ for 10 pills, cause i have a few friends who give them to me for free. but if you dont have that i wouldent pay more than 4 a piece. but depends on how scarce they are and how much you want em man