Dyno
Hi,
If you aren't getting any kind of discount, dynos usually cost about $150 for the first hour, and $100 for each additional hour. Some places will let you rent the dyno for the whole day for $500 or so. Some also offer group or 'club' discounts. In my club, we all dyno three pulls for $40 per car.
Typically they will give you a printout of your dyno runs with horsepower and torque on the same graph against RPM, and printouts of your wideband O2 readings for each run.
I have dynoed DOZENS of times.