Floors are available in a wide range of colours and finishes, Ash, Beech, Cherry, Oak and more.
Also available are a variety of oil stains, black, white, walnut, mahogany to name a few.
Wooden floors vary in cost depending on the materials. The more common, widely available materials are cheapest. Oak in it’s more knotty form and in narrow planks is cheapest, getting more expensive as the planks get wider or more knot free. This is true of just about any wood, with the rustic versions being the cheapest.