Hi MK!
Thanks for getting in touch.
There are not currently any “try before you buy” versions of our premium plugins. In terms of the charge per ticket (when using WooCommerce Tickets) that is completely up to you – tickets can be free or they can cost whatever you think is appropriate and much will depend on the modes of payment you accept since you may or may not need to factor in payment gateway processing fees.
WooCommerce Tickets itself however enforces no particular charge per ticket transaction.
I hope that helps – but let me know if I can provide any more information.