Way to many scam MN coins created weekly. I personally would never buy one unless the coin was already on an exchange or unless the dev set it up as a escrow that he cant get until certain conditions are met (most importantly that the coin is listed on an exchange). This way your safe and the dev will get more for the auction because people will know its legit since they will get their money back if its just a scam.
We are currently at the moment of booming masternode coin, and it's hard to assess them thoroughly at the moment. Only time will demonstrate which one is good project, which one is bad project. So, take care yourself and wait for more news from those masternode coins.