The Amur shipyard in Russia has started sea trials on the “kinda sorta new” Akula II boat.

It’s not completely new, construction was halted in 1991, but this is a very capable boat, and the Indians are getting for $650 million for a 10 year lease.

FWIW, I think that the cost has to be understated, even if the Russians are desparate to maintain their shipyards capabilities, this is a 10 cent sale.