Since it has now become so simple for people to start a micro business from the comfort of their home, there are some great success stories out there.
This article on the Guardian Small Business Network contains the testimony of a number of small business owners that started out with just an online storefront.
Some of them have actually grown from there and now have physical outlets too. A lot of these businesses specialise in offering personalised or customised products to niche markets.
But do remember, as the article advises, if you are operating an online storefront and trading as a business then make sure you are correctly declaring your income to the HMRC.