sadly, I have no photo reprints, but that is a grand idea. In addition, the photos are best accompanied by commentaries, but that is an easy task. Also, photo hardcovers are specialty tabletop books, and I may not be able to go that way...I print on demand, so I have no risk of stocking and investing in books.
It seems like your reprint business really went parabolic in 2018 and just went even more parabolic in 2020 & 2021. As a number series its interesting that if you ignore 2020 & 2021, the 5% yearly increase (starting from 2018 & 2019) gets you to the 2022 number and predicts ~8300 for 2023.