I never had much luck on there. Most are either scams or legit companies that are much harder to deal with than actual RC vendors.
Its good that you found the place. It is just saying you are following the bread crumbs to find your way to the sources. Keep looking and the best way to know whats legit is to try em out. then you can contribute a report to the scene if they are a scam. Or you find yourself a source. I researched for a year before I felt secure enough in my judgment of what is a scam and what is not. I still second guess a lot of the one I have not tried.
I found 1 on a site like tradekey and two that I found with google days before right after. It was amazing seeing them there and knowing they were legit but also sad because tradekey isn't safe for RCs. It's actually better to not find them and have someone bless you with a site. It keeps things real on the down low. Just make a name for yourself on here. Keep posting and someone will help you on your search brother. it's all about karma.
I found at least several sites there. You have to harness the power of google if you want to get extra mileage out of that site..
My experience on there is pretty much the same as explorers. Tons of either legit companies or scammers.