"COSTY ACCORI" appears to be a business that offers a variety of products, including Luxury Retrofit Kits for the Apple Watch. They have a year-end promotion and offer free shipping capped at $50 per order. They also provide 24-hour chat support, secure payments, and a 14-day return policy. They have a presence on YouTube with 165 subscribers and 76 videos. However, without more information, it's difficult to definitively determine the legitimacy of "COSTY ACCORI". It's always recommended to do thorough research and check for customer reviews before making a purchase from an unfamiliar business.