The price range for Shiseido and SK-II products can vary widely depending on the specific product and its size. Generally, both brands are considered high-end and can be relatively expensive compared to mass-market skincare products. Shiseido products may range from $30 to $200 or more, while SK-II products often fall in the range of $70 to $400 or higher. Prices can fluctuate based on the product's formulation and intended use, so it's advisable to check with authorized retailers or the brands' official websites for precise pricing information.