I Obtained an Otherworldly Secondhand Trading Community

I gained access to a secondhand trading community connected to another world—and the reactions there are absolutely ridiculous. A simple triangular flask from an elementary school science lab is treated as an unbelievable heat-resistant treasure, and eager buyers are willing to pay with items mixed with things like dragon hearts. I don’t even know the proper price, so I simply say, “Just give me whatever you think is fair.”