that, and usually they're only available in certain leftover sizesWhen you see helmets that are being discounted like that, it's because they're leftover previous year stock that's being closed out. Helmets technically only have a 5 year life span (which is why track day organizations won't let you use a helmet that has a build date more than 5 years old). Over time the foam that makes up the EPS is said to break down and after approximately 5 years (give or take) it's supposedly degraded to a point where its ability to protect you in a crash comes into question.
With graphics you can tell just by the graphic because many helmet graphics are only produced for a single year. However with solid colors it's not that easy because the solid colors are produced during the entire production run of the helmet.
How often do you guys get new helmets?