Baccarat Rouge 540 is a popular fragrance by Maison Francis Kurkdjian. If you're looking to purchase it on eBay, you can search for "Baccarat Rouge 540" on the eBay website or app. Make sure to check the seller's ratings and reviews to ensure you're buying from a reputable source. Also, be cautious of counterfeit products, as this fragrance is quite popular and often replicated.