I published a thread like 2 hours ago which was taken down and I discussed about this topic with the MOD "I know seo" and he suggested that I should go ahead and repost it because the info was important. So basically whenever you encounter any article service which seems to good to be true for example 1-2 dollars for 500+ words, go ahead and check the uniqueness of the article yourself because I am going to tell you a method which can beat all plagiarism checkers. So lets say the seller delivered an article and it passed plagiarism checker with 100% uniqueness and is well written and everything. Its not always true. I know people who basically copy anything from the internet and then convert UFT-8 to ASCII. After its done, it will show as unique on all plagiarism checkers. So the best way is to manually type 3-4 sentences from that article and check those sentences on plagiarism checker. I won't tell the names of these softwares that can be used for these tricks for obvious reasons but you can do you own research on it.