A work at home business is different from a work at home job. I don't encourage anyone to pay for work from home jobs but you can invest in a business. With a business, you can anticipate on some type of start up fee for your products (like Mary Kay, Avon, Ameriplan, Xango etc). Don't be overly excited like I was and try everything just because "so and so" is making money. Make sure it is something you really want to do. When it comes to investing in an opportunity, make sure its with a company that is well established. Here are some active forums that discuss work at home businesses.
Wahm Sales Businesses
Do you have a business? If so what is it? Sell yourself and leave a comment.