Alternatives
I feel your pain. I've noticed Finnair is usually most expensive place to buy Finnair tickets. I just flew from ARN-HEL-ARN for 89€ and purchased ticket from eticket.fi Finnair offered same ticket for 129€ with all the cost and extras. Only downside with eticket.fi was that I could not add my ff number and their reservation code was useless for checkmytrip or any such. It is also possible to buy cheap oneway tickets through online travel sites which Finnair never offers.