Im getting one because people want to Dyno their engines and have been bugging me for ages so as a servise im offering it.

$50 is an estimate as i stated, Brekky If you bring your Student id id be happy to give you a discount, might stop you crying and complaining about everything . lol

It all depends how long a test takes and what sort of tests people want. Some Dyno tests take an hour to do properly when people want to try different pipes etc. So i think $50 is a fair price.