I don't see a profit advantage in getting common silver coins slabbed, if you don't think yourself that they are better than MS63.
You are better off posting excellent pictures of them here in the CCF, and have us grade them for you, for free! No fees and posting!
Even better if you can grade accurately yourself, or train yourself via the camarardie enjoyed by us right here, as you learn to grade, as the grading threads are posted.
Just keep a hard copy of the thread off your printer for your records, and screw encapsulate them, if you really care about preserving their condition.
Enjoy your CCF!