In the long run it's far cheaper to buy a photo printer (such as Epson Photo series) and then you can print off only the pickies that you want.
If you have a digital camera you can load them onto your PC, edit (resize, crop, distort etc) them using MS software and then print them yourself far cheaper than have others do it for you.
I've just taken an old 36 shot 35mm film in for the photos to be transferred to CD, it cost �3.00. If I'd had it developed and printed it would have cost �4.50. You can see the saving in the long term.
Cheers