How to find a legitimate website broker??

I'm planning to sell my site and have looked into websitebroker, flippa, and semo. I currently listed on website broker, ebay and craigslist because the listing fees weren't bad for website broker and ebay. Are there any reputable website brokers out there and how do I go about finding them? I'm not even sure how to verify if they are real website brokers or have actual experience selling websites. Any input is greatly appreciated!

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