The prices of the drug screening kits is the third thing to note when looking for the right online drug screening kit store. Many online stores exist in the field, but the prices at which they sell the drug screening kits differ. It is possible to find that the same drug screening kit is sold at different prices in different stores. Therefore, before you choose to buy a drug screening kit from any online seller you should check the pricing. The right thing to do when looking for a drug screening kit is to check its price in different online stores. Then compare the prices of the different stores and choose one that sells drug screening kits at a price you can manage to pay.