HJC. $100 for a Snell rated helmet?! My first helmet was an HJC like this, not as comfortable as my Shoeis or Bells, but they are freakin cheap and do the job.
https://www.ridersdiscount.com/hjc-fg-17-fg17-thrust-full-face-helmet-198819
https://www.ridersdiscount.com/hjc-cl-17-cl17-striker-full-face-motorcycle-helmet-231555
That being said, some idea on your buddy's budget would be helpful. If he's going to spend $400 or so, look at those Star Carbons. I've loved my last two and one took a nasty impact from a highside. I bought it's replacement from Mike the following week.