Wood is expensive. The wood species usually determines the price of the cabinets. There are some species that are more standard, such as Maple, Poplar, Hickory, and Red Oak; and there are some that are more expensive, such as Alder, White Oak, and Walnut. There is also cherry wood, but if you ever need to replace a cherry wood door on a cabinet, you might end up with a different color because cherry wood, though nice and luxurious, changes color over time.