How Much Is The Purple Hope Stone Worth?

I made a purple Hope Stone for the American Cancer Society's Cattle Baron's Ball.

It's purple because the ACS color of survivorship is purple. Ok, it doesn't look purple. It looks blue, doesn't it? I assure you, however, that this Hope Stone is purple. I fiddled and fiddled with the color of the photo, but I couldn't get a good representation of the purple. So even if you can't see purple, think purple!

In our area, Hope Stones are given to survivors at the end of the Survivors' Victory Lap at the Relay for Life. Survivors are encouraged (whenever they are ready) to pass the stone and the hope along to someone else who needs an extra boost of hope in dealing with cancer.

The stone is about 1.75 inches high. It is mounted on a piece of Lacy's Stiff Stuff that I painted with violet Dye-na-Flow and backed with UltraSuede. The beaded fringe was added last.

If you want to see my other Hope Stones, you can look here.

The American Cancer Society representative asked me the value of the Hope Stone. How do I answer that question?

The cost of the materials? I already had a bunch of purple beads, the UltraSuede, the Stiff Stuff, the thread, and the Dye-na-Flow. I did buy some beads, but I have plenty of them left over.

The cost of my time? I'm retired. I beaded most of this piece while on vacation, sitting on a porch listening to the sounds of a lake.

The price at a retail shop? Oh, puh-leese! I don't sell hope! Hope is to be shared, to be given away, to be presented generously to anyone who needs it.

I understand that the ACS needs to keep track of the value of contributions, but it was very, very hard to determine how to set the value of the Purple Hope Stone.

How would you value this stone? I'd like some ideas so I can have a better answer next time.