Atoche

Slight tangent here... in other words what you are saying - FF is all about perspective!  In my mind "equivalence" comparing crop to FF makes no sense.  How can one achieve equivalence if you must ...

I, being an amateur who is trying to build a body of work, use to run into the same thing.  I would capture a photograph - which upon post processing I would find that the photo misses the mark of ...

"yes, my good side please!".... For some reason this shot is slightly obscene to me!....

or even higher! ISO 12,500; 24-105L; 1/100; F4

There are strange anomalies present as you look at the photo, to the right, mid way down from the right edge of the photo across the bottom of the boxcar... looks like a photo that had a piece of ...

I agree... Also, is that "tape damage" on the lower left of the photo?  It's strange...

I suspect you will!  As you are likely already aware, a fun camera with quality results, I find it's my default in hand lately... ;)

6D refurb in stock today on Canon's site for $1,099.00.  Not really sure why you are so focused on "gray market"... Anyway - to each his own, have fun out there!