I would love to know something if you find out any good advice, I am looking for the same thing.
one idea you might be able to do though is ebay. You can sell for others and get 10% of what you sell. If the item sells for $100, you get $10, you could advertise and sell for several people and basically just sell. You could even sell for less but say that you don't do the shipping, tell them you will take the picture, do the sale, but they have to do the shipping and then you send them a check for their part and keep a % for yourself.
good luck, it is hard to find something legit with a good incoem.