How does a helmet have an expiration date? You mean expires into "closeout"?Be careful when buying a helmet on closeout. Helmets do have an expiration date and closeout helmets are usually the result of a retailer trying to get rid of product before he can no longer legally sell it.
Try the trade shows to score a good deal on gear. They are trade show only deals that are pretty good. At the very least you can see gear from a lot of manufactures at once.