Punk/New Wave group from Raisio, Finland.
They were put together in 1979 but they split up in 1983.
Original lineup was:
Jarmo Hauhtonen (Vocals)
Joel Hallikainen (Guitar)
Heikki Riihelä (Bass)
Lasse Jalonen (Drums)
Jani Juusela (Keyboards) joined bit later in the band.
There are two artists who use the name Costi: the Romanian musician Costi Ionita and the Finnish singer-songwriter Costi Snellman. Her songs and tags can be found here: http://www.last.fm/music/Costi+Snellman )