Due to the many, many denarii found by detectorists during the last 3 or 4 decades, the price for such silver coins has decreased drastically. But the historical value of them can't be paid: thats why i love metal detecting.
Same thing happened, we had a late ploughed field (none normally) & I got a Roman Silver yesterday as well in 2 hours . With only 1 broken bronze roman coin, some fields make no sence. Can't wait to see whats there today.