Hi - hope everyone is well! Newbie here, looking for my first Omega! Considering this Omega 600 with a grey linen dial. Have only seen a few examples of this dial in my search, so was hoping for some advice. 1. Is there anything obvious I'm missing that needs to be considered before buying? 2. What kind of price range is fair for this particular model? As mentioned, I've seen very few examples of this so struggling to figure out a fair value. Any help would be appreciated. Thanks!