The reality is that most of these (not all) but most will be detected eventually. The best you can do is look for one that has a good record and buy it from someone who isn't afraid to tell you the reality at the cost of a sale. There are some very good options out there though but people will have their favorites no matter who tells them what. There are good guys in this thread but if you want to chat about what options there are hit me up on discord (cloudsp4rk).