I finally broke down and registered for a online printing service. I quit accepting orders about a month ago and shipped everything I had on my backorder sheet. Truth is, I am incredibly busy these days and unable to order prints, mat them, and properly package them for shipment. So I put all of my most purchased photos onto fineartsamerica.com.
It is an incredible website that offers all sorts of custom framing, matting, canvas wraps and various methods of printing and the pricing is not outrageous either.
One of my favorite things about it is that I was able to put an online store right onto this facbeook page! On the bar below the menu, you can see a button that says "BUY PRINTS HERE!"
I will soon add a page to this website so purchases can be made from there as well. But if facebook is not an option for you. The FAA profile for my work is here