http://dailycaller.com/2017/04/14/heres-how-much-mother-of-all-bombs-actually-cost-according-to-the-air-force/
When they were first manufactured in 2003, they cost about $170,000 each.
"Multiple news outlets reported Thursday that each Massive Ordnance Air Blast (MOAB), or Mother of All Bombs, bomb cost $16 million, with a total program cost of $314 million. Those figures were likely gleaned from a misreading of an Los Angeles Times article about a different bomb, and a questionable military asset website, TheDCNF reported Thursday."
I'd say that was $170,000 well spent.
The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence