How much is a 1913 wmenders oak leaf 16 gauge shotgun worth?

Priceless, If it was your great granddads. I have one circa 1910 it is an oak leaf brand. I think it is a W M Enders made by union arms. It is not demascus steel so it is safe to shoot. I reblued mine in 2006 during a round with the flu, took about 2 weeks to complete. I left the original stocks. It appraised for around $150.00.