Well, I've managed to injury a shoulder and recovery may take some time. So I've got a new in-the-box Arai GP-7 (Medium - 56-57cm or 22-22 3/8”) SA2020 helmet with Clear and Dark Gray visor for sale. I picked it up before the injury and now it's well past my return window. If the shoulder recovers enough to race again, I'll order another, but until I know that, it's not smart to hold on to an unused helmet. https://www.araiamer.../gp-7-variation
Also, I've heard from vendors that because of supply chain issues these are difficult to find, with many on an indefinite delivery wait-lists.
It lists for $1060 (helmet $980 & visor $79). I'll let go for $900, plus shipping. It's boxed and ready to go.