Look for generic adult low dose (81 mg) tablets, that are enteric coated, at someplace like Walmart. Check the expiration dates and limit the quantity to what you'll use up by then. They all work out to be the same price per tablet:
300 Ct $4.00
500 Ct $5.97
500 Ct (2x250 Ct) $5.97 Nice if you want to keep them at more than one location and the extra container doesn't cost any more. Some brands package stuff like this that's going to expire sooner to move it out of inventory. Compare the dates.