This was the cheapest SA2010 helmet they had on Summit. Feels good on. Gets the job done. It was $149.
Racequip 252113 - RaceQuip SA2010 Open Face Helmets
Sometimes you can get lightly used Racequip helmets from Amazon retailers at about half price. Two weeks ago I bought an open face Snell 2010 model for like $75. It looks almost new (little bit of dust/dirt in the lining). But now it looks like they are sold out.