Do you think it is effective to post your training prices on your website?

If you are charging the appropriate rate for your time and the services you offer – there is nothing to hide. Posting rates qualifies your leads. Since just about everyone comparison shops on the internet now (and even less will pick up a phone to make inquiries), it is a waste of your time not to post rates.

If you need to do something more advanced you can always figure out a way to offer add on services, or bigger packaged fees, but at a min – post a base rate.
http://krustrengthandfitness.com/programs/personal-training-program