I currently own a wonderful shaving mug from dirty bird pottery. That being said, I thought I might like to purchase another mug to take to the fire station for when I need to shave there. That being said, I have been considering an old occupational mug (too expensive), or an older old spice mug. Thing is, I know nothing about collecting or purchasing these items. My question is how much should one pay for an old spice mug? What makes them more or less attractive (other than condition issues)? Any help would be appreciated.