aa62 - the first thing that struck me was that as was said of the DC-3 the only thing that can replace a Hercules is another Hercules. The second was that whoever wrote the spec went through Lockheed's C-130J brochure and made sure it could meet or exceed everything.
WC - given the reason for the sale is serviceability I would suspect they are only saleable for spares recovery - as I'm sure you know - there are plenty of Hs still used around the world. Although I would think there is a market for refurbished 130s out there. However, probably not these as a believe the two "newest" Dutch ones were refurbished between 2006-9 by Marshalls in the UK. The airframes were ex-USN which had sent them to AMARC (as it then was) in 1991. The C130H-30s were ordered in 1993.