If you're talking about a single server, I doubt you will find anything cheaper. Compare it to AWS, something like c4.8xlarge will cost you $1.591/hr, or $735.84/month reserved.

What is that $70/mo server with 16 cores?

The cheapest I see is Kimsufi KS-5 8-core for $36/month. There's also an EU hoster Netcup that offers RS 4000 8-core for around $33.