This is my opinion of current new Pateks that would suffer minimal depreciation. Some may disagree with me but this list has been compiled after conferring with the London watch trade:
1. Patek 5131J or G - no brainer here due to the long waiting list and within your budget but it is not easy to get one unless you are especially close with an AD. Not a typical first Patek due to its unavailability. But if you do get one, you will make a profit should you decide to sell it. Contact me first please as I have been after the G for years!
2. Patek 5711 - steel nautilus, basic, the cheapest men's nautilus but again due to the waiting list (7 to 12 months), you should get at least 80% of your money back should you decide to sell it.
3. Patek 5990 - just launched in Basel this year but the waiting list is long and the price is within your budget. The most complicated nautilus to date.
4. Patek 5235 - I personally love the regulator with the gorgeous movement and deployant clasp. Great value if you ask me and still very much in demand.
I would normally add the 5712/1a to the above list but I have seen quite a few displayed in shop windows lately so I guess they are more easily attainable.
The general rule of thumb is if you want to make sure you do not want to lose too much money on a watch and insist on buying new, then, buy one with a waiting list. Of course, it means you will have to wait too!
Sham