Contemporary sideboards are available in pretty much all the same material types, shapes, sizes, and styles that any other kind of furniture comes in. When you hear the term contemporary, thing along the lines of modern furniture. This means sleek lines, lower profiles, curved edges rather than corners and angles. These are not hard and fast rules, but in general those are the characteristics of furniture in the contemporary style.
If you are thinking about adding a contemporary sideboard to your home, it is important to know what it is you want the piece of furniture to do before you go about purchasing it. Many people use sideboard furniture for roles other than that which it was originally designed. There is absolutely nothing wrong with that, but it makes sense to know what the role of your sideboard will be in order to be able to pick out the one that can fit that role perfectly.
If you want a contemporary sideboard buffet for your dining room, it usually makes sense to start with that piece and build the rest of the room around it. If you have had a sideboard before you know that it tends to be a main focal point no matter where you place it or what role you use it for. While it is certainly possible to add a sideboard buffet to a dining area that is already finished, it tends to be a challenge.
Contemporary sideboards and buffets range in price from a couple of hundred dollars or less, all the way up to many thousands of dollars for some antique sideboards. Some sideboards have been in operation for several hundred years and look and function the same as when they were new. Some of these are extremely beautiful, and are a testament to the skill of the furniture craftsmen of that era. If an antique is out of your price range there are plenty of alternatives. You can find very reasonably priced sideboards at places like Ikea. These are low priced, and usually made of some kind of particle board topped with a decorative layer of pine or cedar to give it the desired finished look. Remember, you get what you pay for. There are huge differences between a hand made solid oak sideboard and one made from particle board. There is no right or wrong, but it is important to remember the differences.