any "must have" or "records to die for" sets in this sale?
gab
It depends on your tastes and what you already have. Yes, there are some widely recommended and well reviewed "all-timers" here. Just off the top of my head - Mahler Haitink or Bernstein, Bruckner Jochum (earlier DG set), Boult Vaughan Williams, Dvorak Kertesz, Mendelssohn Abbado, undoubtedly many more.