Flippa is a good option if you're looking to sell your website.
Are you just trying to sell a domain? A blog? ecommerce site? Saas? Does it make money or is it a hobby site that someone could throw together in an afternoon?
The site was my hobby but became more like the real deal and I dont have the time to spare anymore. It still generates some money but it can be very strong and useful for the right company/person ho has budget or time.