depending on whether or not your car has side rails you'll need crossbars too. some mount directly to the roof (non-permanent/for cars without side rails) and some attach to the existing side rails. most companies (i.e. thule, yakima) make universal crossbars so finding some isn't a huge issue, but they run about $40-80 per pair. for the rack itself RockyMounts is a great place to start. their smallest rack (3 pairs of fat skis or 2 snowboards) is $139. you can probably find racks cheaper but $ = quality and you definitely don't want your skis flyin away.
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