Any Patek experts out there please help! I am complete novice when it comes to Patek and would be interested in understanding what the basics are of putting together a great Patek collection (in case I win the lotto of course). What are the basic things to look for when buying a Patek? What do collectors value or dislike? What are the dos and don'ts of investing in Patek? How does the market think about/value white gold vs platinum, or rose vs yellow gold? What are the most liquid/understood watches/category of watches? How does wearing them affect the value? What are tips for trying to minmize wear? Should you try and have a strap for daily wear and one in the box? Can/should older watches be restored? Who restores them? It seems like perpetual calendar with chrono is a "benchmark" watch like the 1518,2499,3970,5970,5270 series. If you were going to build a collection of these as an example, should you try and have all one metal type like white gold, or vary the metals, or get one of each? How about the different series within these watches, like the 5970 with or without the "chin"? If you had $1m to spend on Patek would you spend it on one or two important pieces, new or vintage? Would you pick a theme like chrono perp calendar or diversify by complication type? Sorry lots of dumb questions I know but any help much appreciated.