Hobbies for Fun and Profit
Unfortunately, not enough advice about how to make money but a LOT of suggestions for hobbies and crafts are listed. I am not sure people will be interested enough to pay big money for your photo collection. The twenty something crowd I have run into (yes, I know this is not an appropriate sample size) are not collector types. I think it is mostly an issue of space and cash.
I really think there is a difference between a hobby and a business idea. None of these are realistic money makers unless you have a plan and serious time. In other news, I have a collection of some of the popular vinyl albums released during the 1970s and early 80s. Anyone want to offer me enough for the whole lot so I can retire early?