Unless you are EXTREMELY lucky and buy EXACTLY the right board now, you'll want a new board in a year or two anyway as your style and skill level changes. So as Alka says, as long as it's a reasonable size and not busted, $100 for board and bindings is pretty good.
I told my kids, "Someday, you'll have kids of your own." One of them said, "So will you."
-- Rodney Dangerfield.