Doba and World Wide Brands are the two biggest drop-shipping companies out there and there are many others. The products are not that great and many cost more than what you could even get for them.
If you want to get started in drop shipping, here is the best way and it will not cost you any monthly fees.
Find products on Ama*on that are priced lower than what they are going for on e*ay and when they sell, buy them through your ama*on affiliate link and have them drop-shipped to your e*ay customer.
You keep the difference in price and earn a small commission on the sale.
Remember when evaluating profit to factor in your fees.
Believe it or not there are thousands if not more items that are considerably higher on e*ay than other sites, its all about volume with this method. You will probably not find one item that is going to make you rich but if you find 50-100 great sellers that offer a decent profit, you can make a lot of money.
One that I have always wanted to try is Simplx drop-shipping but I hear the same things, no profit so I have held off.
Hope this helps