Sometimes it is all about luck when it comes to reselling. Sometimes you meet a buyer that really wants what you have and you will suffer minimal to no loss. Sometimes, when you choose to sell at the wrong time i.e: economic downturn, then you will not get a good price. But generally, it is safe to say that Rolex has the better resale value. For RM15k, the new ceramic range such as the 116610 and the 114060 is out of your reach. You can get the non-ceramic range such as the 16610 and the 14060 for that amount. For year, best to get one as new as possible.