The Edge Photo Imaging is having their super special on 20" X 30" prints which they seem to run about once a year. It is running until 30th June
Lustre Prints are $15 each, and Metallic Prints are $20 each. Art quality prints are available if you want them, but they are $50 each. The best thing is their postage has always been reasonable. Normally I get 3 prints done and from memory the postage was $10 for the 3. Please check it is still the same.
These people are high quality printers.
My only hassle with them is their software is a bit confusing to use, but last time there was there was the opportunity to upload via FTP, so that is what I did. The FTP was a mile easier to use.