O Kostis Maraveyias spoydase Armonia, Adistixi, Foygka, klassiki kithara piano ke krousta kathos ke Statistiki sto Panepistimio tou Mpari tis Italias.

To 1995 simmeteihe sto kalokerino ergastiri ‘MOUSIKI YIA TENIES’ me ton Ennio Morricone stin Accademia Musicale Chigiana tis Siena.

To 1996 shimatise to sigkrotima X-darawish, ena poliethniko shima me Ellines, Italoys ke Algerinoys mousikoys. Ihografise dio cd ek ton opoion to teleftaio ‘una ratsa mia fatsa’ (FM records, il manifesto), poylise 15.000 aditipa se Ellada ke Italia.

To single tou diskou anixe ti sillogi ‘Top of the European Pops’ pou epimelithike to RFI musique.

Emfanistike se perissoteres apo 200 sinavlies ke festival se Italia, Ellada ke Velyio, opos sto Dranouter Folkfestival, 'festival caterpillar' di BRISIGHELA (se apeftheias metadosi apo ti RAI), 'festival mediterraneo' di CONVERSANO, 'CARPINO folkfestival' k.a.

Ton Ioynio tou 2003 kikloforise i proti tou prosopiki doulia apo tin FM records me titlo 'Radiopiratis'.

To kalokairi tou 2004 simmeteihe stin periodeia tou Dionysi Savvopoulou kathos ke stis parastasis "I sinavlia ton kerion" sto Irodio. To 2005 akoloythise yia deyteri sinehi hronia, i sinergasia tou me to Dionysi Savvopoulo avti ti fora stin parastasi "Aharnis ke tragoydia yia neous kadadorous".

Apo to Noemvrio tou 2005 simmetehi stin Orhistra tou Dromou mazi me tous Panayioti Kaladzopoulo, Eianthia Reboytsika, Giota Negka ke Elli Paspala.

Ton Ioynio tou 2007 kikloforei apo tin diskografiki eteria Cantini o diskos me titlo "MARAVEYAS ILEGAL" o opoios apotelei mia efharisti ekplixi ke mia axiologi diskografiki doulia yia ta mousika dromena tis horas.

To 2009 o Kostis Maraveyias epistrefi diskografika meta apo dyo hronia me to kenoyryio tou album "welcome to greece". Eine enas diskos ihografimenos live sto stoydio apo ton Kosti ke tin bada tou, me vintage iho ke asteirefti live energia. Tous stihous ke tin mousiki ehi grapsi o Kostis Maraveyias, eno i Maraveyas Ilegal eine i: Kostis Maraveyias (dimiourgos & ermineftis ton tragoudion, akordeon, kl. kithara, piano), Ilan Manouah (saxofono), Nikos Papavranoysis (tybana), Άggelos Papadatos (kodrabaso, foni), Grigoris Ntanis (kithara).