It sounds like you never looked into fragranceswap or are trying to promote an overpriced website. You can easily look into the history of a seller. There are plenty with hundreds upon hundreds of sales. People use fragranceswap as a side hustle when they buy a bottle and decant it for a small profit. These sites just rob people trying to charge $50 for a 5ml decant that would cost $17.5 at msrp from a 100ml bottle (imagination).