St. Joseph Hospital Silver Medallion Value/Market

I came by this St. Luke's Foundation St. Joseph Hospital Proof Medallion a couple of weeks ago. It was struck by the Northwest Territorial Mint, Auburn, WA, about 1991. The Certificate of Authenticity identifies it as 2 t oz of Silver.

I've been trying to 1) identify the possible value of this as a collector medallion and 2) if there is collector value, identify a market where the medallion might be offered.

So far, I've been unsuccessful with either of these efforts. Hopefully someone can point me in the right direction with this.

Thanks!