By using KoorTickets instead of Ticketkantoor.nl a lot of money has been saved already.
...organiser 1 saved €47,20 (48 transactions: 89 admissions)
...organiser 2 saved €57,80 (109 transactions: 154 admissions)
...organiser 3 saved €32,40 (36 transactions: 63 admissions)
...organiser 4 saved €15,70 (23 transactions: 34 admissions)
...organiser 5 saved €9,90 (6 transactions: 13 admissions)
...organiser 6 saved €52,80 (64 transactions: 106 admissions)
...organiser 7 saved €42,50 (43 transactions: 80 admissions)
...organiser 8 saved €111,20 (104 transactions: 172 admissions)
...organiser 9 saved between €98,02 and €125,22 (120 transactions: 198 admissions, 34 other products)
...organiser 10 saved €79,00 (121 transactions: 189 admissions)
...organiser 11 saved between €29,50 and €31,10 (46 transactions: 80 admissions, 2 other products)
...organiser 12 saved €73,00 (81 transactions: 140 admissions)
...organiser 13 saved €41,52 (64 transactions: 93 admissions)
...organiser 14 saved between €85,26 and €332,46 (471 transactions: 250 admissions, 309 other products)
...organiser 15 saved €4,00 (5 transactions: 5 admissions)
...organiser 16 saved €17,70 (19 transactions: 34 admissions)
...organiser 17 saved €0,20 (1 transaction: 1 admission)
...organiser 18 saved €0,80 (1 transaction: 1 admission)