Found: Valuable collection of Magic cards

Recently checked the content of a bag that was in our lost and found for a while. Please contact me if you recognize this box and know about its content. The value makes me quite sure someone has been pretty sad about losing them.
Please don’t try to claim without any sort of proof (which rare cards are in there, when and where was it lost or stolen etc.), nobody has the time for that sort of dicking around. Thanks. ❤️