Buy two toilet blocks and you get no less than four extra free of charge. Albert Heijn is more often with high discounts, but this week’s action stands out. Good for your wallet you would think, but is everything at the deal what it seems? Both economist retail expert Pierre-Alexandre Billiet and promoer Gunther Devisch have a warning for the bargain seekers among us. “In this store, the deal is secretly even better.”

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