Helium miners are very good investment because they are very effecient and once you setup them , you don't need to mantain them every month you just setup first time and forget , The main problem is that these miners are producing in limited quantity and if you want to buy you need to wait for 6months but if you want to buy in primium price these are available and can be shipped in 14 days but the price of miner is around 300$ and for fast delivery and buy from other seller you need to pay 1000$ which is worthless because the ROI is way above 3years instead your area have 4, 5 helium miners , because they use network and more miners means more chances of getting sheres=$ 🤑