All name brand helmets meet safety ratings. The rest of the price is in looks and comfort, supply and demand.
Part of the reason I got mine was it is well vented. Another is it has a visor. Another is I like the way it looks. It's a Bell, and I don't even remember the model. $60, happened to be on sale.
Comfortable too, by the way. Found that out later. Didn't like my Giro. That fell apart after 2 weeks.