A $100.00 helmet for a $100.00 head.
Buy quality & you buy less often & you will be confident that it will do it's job.
"Lesser" priced helmets (as long as they are snell approved & not just DOT) will do there job as well. just not last as long with frequent use.
Materials & workmanship are not as highly considered with these helmets.
But... You can get great deals on higher priced helmets Like a Shoei RF1000 if you look hard enough. I have seen a nice grapic Shoei RF-1000 Camber Graphic Helmets - Closeout Competition Accessories
Helmet going for 99.00 (reg 475.00) as long as you have the right sized head & don't mind an older model.
That is, if you are looking for a full face helmet.
I have used this helmet for 5 yrs. every day, & I love it.
keep in mind when choosing a helmet for off road that weight is an issue to consider. A nice light helmet will be a blessing after a long day of riding.
Also when racing in dusty conditions, a sealed full face helmet with a Parker pumper, will benefit you greatly.
There are many options & "Favorites" to choose from. Open or Full or Moto cross style.
Find one that fits properly, gives a lot of peripheral vision,vents well, SNELL Approved(Meets or exceeds SNELL SA2005) & will work for "YOU"
Test fit & try on as many as you can.
Then choose the Helmet to buy. Don't let price be the first deciding factor.
Once you find the helmet you want, Then.... go hunt for the best deal on it.