Legendary sword (Run a shop for adventurers remix)

You run a shop selling gear to adventurers. One day an adventurer brings in an enchanted sword of unknown origin. Your business partner is convinced it might be something extraordinary, but how will you find out for sure? A remix of the earlier scenario, a little more plot focused this time. This scene came together in my head and I thought it might make an interesting setup. If you just want to have fun running a shop the earlier one is probably a better choice, but if you like a bit of mystery and drama then this one might appeal.