A shopper might get a bargain at Armstrong's Store if the owner is in the mood to be charitable.
Most of the time, Armstrong deals straight and keeps his purse strings tight. He sells food, metal implements, livestock and alcohol. But if you purchase the latter you'll have to find someplace else to drink it. He doesn't allow drinking inside the store...leads to shootings or worse. He also is a pretty good salesman and is known to spin a yarn or two about his stock if it will translate into a sale.
The other thing Armstrong peddles is news. He knows all the goings-on in and around the town. It's the one thing that Armstrong will peddle for free.