I recently offered some no longer needed toys for sale in ebay. Winner of the auction was someone in southern France even the auction was valid only for Germany. This sale was a nightmare, therefore I can understand everyone for only shipping inside Germany and rejecting Paypal. I'll do the same in future.
Depending on the destination, shipping outside Germany is sometimes a little bit difficult. Some time ago I sold some old riveting tools to a collector in the USA and this caused a lot of paperwork. A friend sold something to Norway and it was very difficult for him to get all the necessary papers for an export outside the EU.
But usually pictures should be no problem if there is a post office nearby. International shipping should only be done with registered letters. (Paypal requires registered shipping!) Unfortunately the Deutsche Post has closed many socalled Post-Agenturen (Post shops) in rural areas. So if the seller lives in such an area and the next Post shop is far away, international shipping is very time consuming or not really possible.