I'd shy away from ever referring to a lot of autos as an investment unless they were HOF autos or mortal locks for the HOF, unless you're buying them...
This is what I have thought about doing with COMC, exactly what you suggest: Send in left over refractors, inserts, etc. and price them to sell, then...
Hmmm...no Xfractor mentioned in the paralells. Kind of disappointed they are moving the blue wave refs to the main set, I liked the redemption pack a...