No, tickets are not required as entry to the market is free. Purchases from vendors are made directly at their stalls.
As the Grand Rhenen Market is a public market, there are no tickets required for entry. Visitors can simply walk in and explore the stalls freely.
Any transactions for goods are conducted directly with the individual vendors at their respective stalls. Payments are typically made in cash or via Dutch debit cards (pin-pas), though some vendors may accept contactless payments or credit cards.