My second job out of college, back in 2011, was as the only employee for a drop-shipper who sold fabric for upholstery, lighting, and all kinds of home furnishings. Her website was an off the shelf .NET ecommerce app she probably paid a few thousand for. I was the customer service rep and web dev for the company. She did surprisingly well, grossing $120-160k a month. Her margin was around 20% I believe. I made a pretty small salary but it was a great way to kickstart my dev career.
Edit: For clarity.