Nice stuff, guys. I am so amazed at where photos have gone, and how far they still have to go.
The hardest part of it, and the biggest adjustment for me, is that photo collecting requires a lot more aesthetic care than a card. It isn't just condition but also the composition and significance of the photo that go into its value. A really striking photo can go absolutely crazy at auction, like this $4200 LOTG sale:
A nondescript photo, even with all the right stuff in terms of year and player and event, does fair to middling.