Hey all,
If you are looking buy/sell watches, whether it be luxury, smart, hybrid or more with Bitcoin, then I've set up an anonymous marketplace using Squeak Road where you could do just that. All payments are done using Lightning and a 3% fee is taken for each sale. Buyers can leave ratings for each completed sale, and the ratings are used to calculate a score for each seller account. Finally, a 1 sat user activation fee is taken and can be retrieved upon account closure.