Have you tried any of your listed watches on your wrist ? This is the number one thing for me to do before pulling the trigger. You may love them in 2D on the inter web but the only true litmus test is to wear them. I have bought watches on line and ended up selling them because they were either too big or just not what I was expecting.
You can always ask for a discount, unless they have one of those signs "please don't ask for a discount as a smack in the mouth may offend".
Watches are a hobby, if you want "investment watches" purchase Rolex, Patek, AP but pick the right watches as some are infinitely more collectible than others and pay retail and keep them in a safe, thus never partaking in the hobby.
Looking at your list I don't see any superstar investments nor do I believe gold watches particularly retain their retail value. Thats a pretty broad statement re the gold but unless its a special watch prices tend to dip.
Buy what you like and wear it knowing it will lose value and get scratched, once you accept that this is a great hobby.
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