I currently have a blue Seamaster, I've had it now about 5 years. I also have a black Invitca that looks like the Submariner. Now I'm wanting to get a watch that has a white type of face. I was looking at the Tissot T17 and T34's, but then started looking at maybe getting a vintage Omega instead. I'm looking at spending around $500. I think I would rather spend the money on an older classy Omega then a new Tissot. What are some tips I should follow when looking for an older omega? Any help is appreciated.