Here in Greece concert performances of foreign bands/artists cost around 30€ to 90€ (depending on how well known the artists are) and many times it is a festival with more than one band performing.

I think Greek bands/artists charge around 0€ to 30€ for concerts (0€ because some do it out of charity, to help a cause)

Btw I think I’ve never used ticketmaster, we have a viva.com which handles many of the tickets (and it too is an annoying service).