tickets are 15 leva (~8 euro), the venue is limited to 200 people, still not sold out, but i guess it will be soon. my advise (if you decide to come over) is to arrange tickets earlyer here-
office@radiotangra.com.
place: Backsyage club (100 Vasil Levski blvd., Sofia)
i'd answer more questions, if you have, i'd like to help you!
shentov