Thank you all very much.. I really appreciate the responses. I 110% plan on keeping my grandfather's entire investment together, whether it be as is or in a different form. For what it's worth, I haven't sold anything yet and I think that the longer I hold the proof sets, the less likely I am to sell. But at the same time, it feels foolish not to sell..
I hope I'm not stepping on any toes here, but I just can't seem to justify holding 250$ worth of coins that are increasing in value only slightly, if at all, with little long term upside; when at the same time, I can sell and nearly double my current silver holdings, which I believe will definitely increase significantly, all while still keeping the investment complete. Seems kind of a like a no-brainer to me...
I guess we'll see... free time is tough to come by for me right now so I haven't had much of a chance to head to a coin shop. I'm certainly not rushing out and jumping at the first deal I find, but if I find a good offer from someone who is willing to trade for silver bullion... think I'll have to pull the trigger.