Yeah I really did hide the price down there hah, thanks for pointing that out! I think you nailed with what are the most important questions users will want answers to before going any further, and they would be easy enough to make more obvious on the landing page or before connecting with FB, I also completely forgot "how long?", which should definitely be added, thanks!
Do you charge for shipping? 50 cents per photo seems pretty high, unless you have free shipping. Or maybe that is just the right price and I shouldn't compare it with our prices here in Brazil (we print millions of photos at where I work, in an HP Indigo printer, for less than a quarter than that, though we charge for shipping separatedly).
Yes, the charge for shipping is a flat rate of $3 to anywhere in the world. I also agree 50 cents is a bit high, I would like to get it down at some point. I am using a fulfillment provider and currently at the mercy of their costs (this is very convenient though). It sounds like since you print your own and have a large volume you can get the cost much lower. I think printing my own in the future may be an option and would lower my cost a lot.