Persuade to pay more than originally intended

UPSELL

["Encourage a customer to buy a pricier version or additional features during a sale."]

The clue "Persuade to pay more than originally intended" hints at the sales tactic of encouraging customers to buy a more expensive item or add extras. "Upsell" fits perfectly because it describes this exact practice—convincing someone to upgrade or spend more. The word combines "up" (indicating an increase) and "sell," making it a straightforward definition without hidden wordplay. It’s a common term in retail and marketing, so the answer is direct and clear.