Hello
My suggestion to a profitable prduct is BE UNIQUE.
If you are selling the same thing as tons of other people online or on auction sites, you have to compete with them, and eventually everyone keeps lowering their prices to get the sale, and the prices are so low that no one is making a profit.
Put a new spin on a popular item - Bundle it with something else, Have a unique marketing plan, anything to stand out over the competition.
Good luck.
Tiffany
Mountain View Movies