What you are paying for with the extra $115 is more than likely:

• Name
• Weight
• Fasteners
• Bling Factor
• Maybe more aerodynamic design

I don't think you can go wrong with a $35.00 helmet as long as it is safe. In fact, it is likely (but not necessarily true) that the more expensive helmet is not as safe, since sometimes material is removed in order to make helmets lighter or more aerodynamic and not as strong.