The film (T200) is special due to the cubical and hexagonal halogenide crystals. But talking in selling amounts,
Fomapan 100 is their best selling film if I can extend the statistics from my Fotohuis.
...... and very nice in architecture classical vintage photos.
Prague in Winter. Fomapan T200 E.I. 160 in R09. M7+Elmarit 2,8/28mm + Y filter.