If you're feeling sneaky, you can park in the factory-outlet parking lot and browse the stores before starting your walk to the border. Although I've never seen it happen, a sign warns that the parking lot is for customers only, and illegally parked cars will be towed. Walking at a determined pace, I can get from my parking spot to the Mexican pharmacy and back in about half an hour. Taxi drivers and street vendors eagerly await your entry. Rich and I casually check each pharmacy on the way for inventory and pricing of smart drugs.
Prices can also fluctuate.
A store may want to clear their inventory for the purposes of refreshing their stock. Sometimes, bargains can be found. Even if I don't buy the bargain product, I will use the bargain-priced item to negotiate a better price at a competing pharmacy. I can also negotiate the price down by buying in quantity. Even if Rich is standing right next to me, we will buy as one person to give the impression of a large order.