Often referred to as print on demand publishers, these links are to places that will print, publish and help distribute your work, while you still maintain all the right to your work. Basically they allow you to become the publisher and offer their services to help you succeed. You receive royalty payments for every book sold, they often times help with marketing as well. Prices often range from 300-1500 per book.
If you choose this as a way to get your works in print, I urge you to read over their FAQs and get to know them through correspondence before settling on one.