I have both my grandparents Omega watches. My grandfathers is a likely 1960s Omega automatic seamaster deville, woking and in really nice shape. My grandmothers is an Omega automatic Geneve, same time period working and also in very good shape. Thye are both in original boxes. I want to get an idea for their value in the event that I wish to sell them. I have never opened them and would never attempt to myself. Anyone have any ideas? Thanks so much for any help. I have someone possibly interested in buying and I am just looking to get a fair price for them.