By using KoorTickets instead of Ticketkantoor.nl a lot of money has been saved already.
...organiser 1 saved between €298,71 and €425,91 (356 transactions: 594 admissions, 159 other products)
...organiser 2 saved €47,20 (48 transactions: 89 admissions)
...organiser 3 saved between €66,70 and €89,10 (97 transactions: 144 admissions, 28 other products)
...organiser 4 saved €85,00 (121 transactions: 197 admissions)
...organiser 5 saved between €90,20 and €151,80 (159 transactions: 204 admissions, 77 other products)
...organiser 6 saved between €20,00 and €21,60 (24 transactions: 40 admissions, 2 other products)
...organiser 7 saved between €77,50 and €449,50 (403 transactions: 305 admissions, 465 other products)
...organiser 8 saved €340,20 (82 transactions: 483 admissions)
...organiser 9 saved €63,30 (76 transactions: 126 admissions)
...organiser 10 saved €165,40 (143 transactions: 314 admissions)
...organiser 11 saved between €288,93 and €369,73 (380 transactions: 598 admissions, 101 other products)
...organiser 12 saved €57,80 (109 transactions: 154 admissions)
...organiser 13 saved €13,00 (22 transactions: 30 admissions)
...organiser 14 saved €24,91 (42 transactions: 58 admissions)
...organiser 15 saved €93,10 (121 transactions: 192 admissions)
...organiser 16 saved €33,30 (47 transactions: 71 admissions)
...organiser 17 saved €26,50 (27 transactions: 50 admissions)
...organiser 18 saved €93,30 (118 transactions: 181 admissions)
...organiser 19 saved €15,70 (23 transactions: 34 admissions)
...organiser 20 saved €9,90 (6 transactions: 13 admissions)
...organiser 21 saved €10,60 (14 transactions: 22 admissions)
...organiser 22 saved €52,80 (64 transactions: 106 admissions)
...organiser 23 saved €56,90 (83 transactions: 123 admissions)
...organiser 24 saved €59,80 (58 transactions: 111 admissions)
...organiser 25 saved €42,50 (43 transactions: 80 admissions)
...organiser 26 saved between €0,30 and €1,10 (1 transaction: 1 admission, 1 other product)
...organiser 27 saved €4,00 (5 transactions: 5 admissions)
...organiser 28 saved €45,90 (33 transactions: 78 admissions)
...organiser 29 saved €2,40 (3 transactions: 3 admissions)
...organiser 30 saved €5,20 (2 transactions: 8 admissions)