I don't know about the treasure whereof you speak but I know I'd sure like to get nice fresh dug ancient coins and relics from some honest supplier over there. I hear it's illegal but one can dream.
Many years ago I knew a fellow in Florida who had direct connections with suppliers in Bulgaria. The uncleaned ancient coins he received were great. I used to buy 100s from him for 30 cents each. I found several excellent silvers and many of the large bronze coins turned out to be Neros.