If you drop ship keep in mind:
You will have hundreds if not thousands of direct competitors selling the identical product.
You have no control over the quality of the item.
You have no control over quantities in stock. If the supplier runs out, you will not know. You get the neg for non-performance and lose the payment.
You have no control over packing. If something gets broken in transit, you get the neg and lose the payment.
You have no control over shipping. If something is not sent, or sent to the wrong address, you get the neg and lose the payment.