love it or list it

Earlier this afternoon, a friend of mine sent me a picture message of a Philadelphia Starbucks mug I had given her for Christmas last year. I considered adding to her collection this Holiday and remembered the Fairmount Park Starbucks mug my Aunt had given me for Christmas a few years ago.

A quick Google search revealed that the 2007 mug is considered rare and last sold on eBay for $166.

I have been using the mug a couple times a week, unaware of its value. My coffee tastes like coffee regardless of the mug. I'm not really much of a collector and see no point in sticking it on a shelf. So, I am faced with a decision...do I cash in on eBay or continue to use it like all the other mugs?