SOFIA (Bulgaria), August 17 (SeeNews) – Bulgaria's AT Engineering 2000, the sole bidder in the tender for local engineering firm Technoexportstroy, is proposing to pay between 50 million and 60 million levs ($31.6 million– $37.9 million/25.6 million euro–30.7 million euro) for the state-owned company, the privatisation agency said on Friday.