Target offers the Swimways Small Swim Noodle 35-Pack in assorted colors for $53.99. Coupon code "TGT4DN9P" cuts it to $48.99. With free shipping, that's the lowest total price we could find for this quantity by $21, outside of the mention below.

A close price: Pool Supply World via eBay has a similar 35-pack for $49.99 with free shipping.