Stranger Tickets' fees are simple:

Service Fee*: $0.85 + 3% per ticket (up to $10 max)
Processing: 3.2% per ticket
*Event organizers/affiliates may add facility or other additional fees to their events.

Of course, if your event is free, there are no fees at all.

There's no delivery charge for print-at-home or will-call tickets.
Mailed tickets are $1 each for First-Class Mail. Add $6.50 per order for priority if you want them faster.