LONDON — United Cinemas Intl. Central Europe has paid $18.5 million for Ster Century’s cinemas in the Czech Republic, Hungary and Slovakia, making it the biggest exhib in the region.The purchase includes Ster Century’s multiplexes in Budapest, Prague, Brno and Bratislava. The deal gives UCICE 120 screens across 11 sites in three countries by the end of this year. UCICE’s first multiplex opened last week in Budapest, featuring the first digital projector in Central Europe. Two more plexes will bow this year in Bratislava and Prague. The company was founded in 1999 by Arthur Goldblatt and V.J. Maury, with backing from Argus Capital Partners. It is affiliated with UCI, the exhib joint venture between Paramount and Universal.