I also prefer PP in white metal (WG or PT) while Lange in pinkgold.
Don't worry about the availability of the 4860, check some smaller ADs on the West Coast, they may still have a few in stock. High-end watches sell better on the East Coast and especially in well-known ADs. Besides, smaller ADs can even give you better discount.
Due to the recent appreciation of the EURO, the list price of both Lange and Patek may increase soon on the US market.
The difference between two gold is the ingredients of non-gold material.
Younger people prefer pink gold, while older yellow gold. Pink gold is very popular in EU and USA. Additionally, on the second market, PG resells better than YG.
By the way, mine is pink. If you could choose, pick pink.
德国公价含税. You can get about 12% back if you hold short-term business or tourism visa.
买的时候有折扣. But don't expect heavy discounts like in HK, 10% is already fine for walk-in clients. Of course, if you have a good, I mean really good, relationship with a certain dealer, you can expect more. In general, Pateks and Langes don't have large discounts in Europe.
打折季节 is only for clothes, nothing to do with premium luxury watches. I don't think any authorized dealer will make official special offer on ANY model of Langes or Pateks during this season.
By the way, just heard that both Patek and Lange will adjust their list price soon. Adjustment means here increase!