I'm assuming you're talking about grooming clippers. I last had mine done about a year ago since I only groom my parents dogs. It was $8 per blade and $12 per pair of scissors. I actually used the guy that a nearby groom shop uses, so they let me drop off/pick up right from their shop since the sharpener comes to them.
How long ago was that?! That's an odd price difference for shears and blades I think... because you have to take the blades apart and then put them back together, re-align them etc.
We've been paying$5.50/ blade, and $8 for shears. Plus shipping.