MakeMusic does not make old versions (pre-2012) available for download except for the updaters that have always been available no other way.
They have not discouraged those of us with old CDs from making the images available to those looking for those older versions. In fact, they've stated that's the only way to get it. You can't activate without that license in your MakeMusic account.
I don't think I have CDs of all my older versions but I have many.
You can sell them but they're worthless, unless you want to sucker someone to pay you and then have to pay Make Music for an activation code. If you don't have a "junk box" in a closet, just throw them away and be done with it!