For under $100, I would recommend a Daiwa Eliminator Surf Spin 9', MH, 2 piece, 12-30lbs, 1-6 oz. $50.
Of course the other anglers suggestions are very good and excellent, but those rods are expensive. More than $100. I would not spend that much for a fishing rod, maybe the reel. I have not caught a fish that have broken a rod yet.
Shop around and ask the bait & tackle shop and fellow fishermans for more info and suggestions before you decide to buy.