Getting cheap prints through the internet

I've recently tried getting some large prints, 12 x 18 processed via the internet. I am sure ther are plenty of places but I have used http://www.photoenlargements.com.au/. Their support has been great. One batch slightly damaged in transit by the courior was immediately replaced. All my big prints at camera club have been done here. A big batch of 20 prints worked out to be only $2.80 each after postage and GST added, so you can afford to experiment with different versions.
Graham