Setting aside emotional value I guess monetary value is a good estimate. An example would be when I, through a misunderstanding, received two copies of a $16 p

Setting aside emotional value I guess monetary value is a good estimate. An example would be when I, through a misunderstanding, received two copies of a $16 promotional Magic card for free from my local game store. I tried explaining that they gave me something way more valuable than the free 30 card deck I had a code for. They just threw in that free deck as well and didn't want to hear it. The cards have since decreased in value somewhat, and I have other much more valuable cards, but the story of how I acquired them somehow make those cards feel very valuable to me.