收買 price is very very low. I bought an old model yellow gold cartier secondhand watch with big diamond bezel at only 40k a few days ago. This watch at least sold for over 120k many years ago. so be prepared that they only offer you 1/3 of the price you purchased.
Only rolex secondhand price stands better.
PM me if u want to know the place I bought my secondhand watch. They also buy watches from clients.