And if you incorporated your ebay business, it would likely pay very little in taxes too. But then you'd take the same income as wages and pay the same income taxes you did before you had a legal title on your business.
At least in the Netherlands, that is not allowed.
With an LLC you have to give yourself a living wage. Also, if you mark them as profit (not pay them to your employee (yourself)) you have to pay corporate tax.
You also can't just deduct your breakfast.