That could be an expensive gamble to have them regraded I think. Likely upwards of 50$ PCGS each considering bad exchange rate shipping etc. If they give ms 65's, let's say there's a 50/50 You've already spent 10 or 15 getting it graded once, and what ever it cost you for the coin, so if it's a 64 by PCGS, you've sunk likely upwards of 80-100 into each. Just my opinion and I carry a slight bias, I'm not a graded coin collector. If it was myself, rather than spend more on grading I'd just buy more coins with that money.