Eternity Coin is a sub $100 masternode (for the moment) with a 30-40% return per month. From an investment, this is a good buy and I have checked out their community on slack which is very active and enthusiastic. Overall it's a good investment for a masternode for people wanting to get into it.
Can I run eternity master node on a raspberry pi 3? I may get one for fun

-Found it. I think I can. :Dhttps://github.com/eternity-group/eternity