It highly depends on the facility and where you live, some guys just want peak readings and a single pull on a chassis dyno is just as good. This service around here is about $100 to $300 if the parts you are buying is through that shop. Sometimes it free. Typically you'll get a chart with torque and Hp readings corrected for atmosphere and a list of all the actual numbers at each rpm. BSFC figure go along with that, extras would include probes for exhaust etc. Breaking in an engine is significantly more.
Have it running before you get there...well! Diagnosis time is expensive and you'll be crapping your pants if you lose the setup fee.
I like the chassis dynos myself because its a test of the entire drivetrain.
Outlawed tunes from outlawed pipes