Total hashpower for Bitcoin has never been higher, and buyers are always looking for faster rigs. Some hash power has moved to Bitcoin Cash, but together they dominate the Crypto space.
At the retail level, the Antimer S9 is tops at around 13.5 th/s. If you live in an apartment with free electricity, you'll make about $18/day. If your paying .12/kwh you will make about $14.40/day.
A newcomer to the miner market is Hminers.com. Take a look at 2 of their recent offerings:
They are offering a 130th/s rig for $7000. Even if you're paying for electricity, you would make about $170/day with this miner, or $5000/month.
It seems too good to be true, and our guess is, it is.
Don't be enticed by this product unless you can buy it in person.