Of course it varies from lab to lab, but my 4x6 matte or glossy digital prints are .30 cents/piece. Regular 35mm is .25/piece plus a $1.92 charge for the development of the negatives. With regular film, I can go up to an 8 x 12, but with digital I'm relegated to only two sizes; 3 1/2 x 5 or 4 x 6. MY cost is exactly the same in the production of the prints b/c the only thing you are changing is the process in which you are getting the information. With most labs, you're looking at anywhere b/t 2 1/2 cents - 5 cents cost per print. Mark up in photo developing is 500% and up. Sounds like a lot, but my last Agfa MSC 101 machine cost me $120,000. Takes a lot of pictures to pay for that damn thing!
Not because I have one, but if you truly want your pictures to be developed the best way possible, find a place in your area that uses some type of Agfa machine. There are numerous reasons, but the biggest is the fact that with an Agfa machine, all your negatives are scanned, adjusted for density, and adjusted for color by a computer and NOT the particular operator of the machine. Places like Wal Mart have a contract with Fuji, so they have to purchase fuji equipment in regards to their photo developing. ALL Fuji photo machines depend on the operator of the machine for all color and density adjustments. Whereas the Agfa MSC 101 is all done by computer, so you continously get the best developing possible. Agfa has a patent on the technology, which is called TFS or Total Film Scanning. Numerous years ago I ignorantly purchased a Fuji 170d Printer and film developer. It was one of the worst mistakes of my life. I got it for $30k, and you could damn sure tell it. Most people think its their cameras when they take bad pictures, but the majority of the time it depends on what photo developing machine you get your prints done on.
It happens to us all the time, a person brings in their negatives and their corresponding pictures that they have had developed at WalMart, Krogers, K-Mart, CVS, etc...etc...asking us if there's anyway we can make the pictures look any better. After I run their negatives through our machine and compare them to their existing pictures, you'd swear that they were not taken with the same camera.
All in all, Kodak, Konica, and Fuji Photo Developing machines SUCK! Agfa is leaps and bounds ahead of the market when it comes to processing prints. Noritsu is also a decent manufacturer and their machines are also based on the same premise as Agfas. Their machines also utilize a similiar type of negative computer scanning for images, yet its not up to par with that of Agfas. If I didn't have an Agfa Lab in my area, I would then try and find someone that used a Noritsu.
Apologize for the length of this post, but I thought I'd clear up the misconception that people believe its their camera's fault when their pictures turn out like chit, when in fact, its the type of equipment that's doing the developing...