I think the business would be useful, but the chief problem you're going to run into is shipping. I'd like to buy single 55 gallon garbage bags, or a couple of pill vials, but shipping is likely to cost me more then the price of the items. I wouldn't be willing to buy things that way. If you can get around the shipping cost's problem, I think its a fine idea.
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A gentleman should always be able to break his fast in the manner of a gentleman where so ever he may find himself.--Good Omens