As I was carrying them out, I glanced inside and spotted an old iridescent glass inkwell that my grandfather always kept on his desk. Going back inside, I asked if I could keep it (I just wanted it for sentimental reasons), and was told I could.
A few months ago, I was watching Pawn Stars and spotted a similar inkwell sitting on a shelf. I looked it up online and it turns out that it was made by an Austro-Hungarian company sometime between 1890 and 1910. It's estimated value is somewhere between $800-1000, but I doubt I'll ever sell it.