I have not heard of a Cortly Randy. Not too surprising considering the number of top quality copies out there.
My D28 is also a bit special. In 1978 or thereabouts the Martin factory in Nazareth got burnt to the ground, destroying all their 150 year old Russian spruce.
I bought my Martin the year before. Mine has no re-enforcement in the neck, and has broken a few times.
The sound is better than the steel reinforced ones made later.
An interesting thing I have discovered is that the better the guitar, the less it is worth on the market in relation to the original price.
I believe this is because more of them are in the hands of professional musicians who tend not to pay as much for their instruments as others do, or value them highly in monetary terms.
For example, although my D28 is highly regarded by professionals because of the neck not being reinforced, it is worth several thousand dollars less than it would be if it was the later model, due to those who buys them always being able to find a cheaper one amongst their peers.
The same thing happens with used bicycles. One can buy a top of the range racing bicycle very cheaply, as the seller usually has access to special deals within the racing community, and clubs.
I learned something new about you today, and often notice there is more to you than I noticed before.