I'd say whether world coins or U.S. coins you'd have to gauge whether grading it would add value to it or make it sell for close to its true value or if it would be an additional cost that eats into your return on it when you sell it. Or makes it a loss. Not everything should be slabbed and graded. I'd say coins that need that 3rd party verification to make a buyer feel comfortable about grade or variety attribution or authenticity in order for it to sell and make you happy when you sell it wit what you get for it, yeah should probably get graded. If your coin is worth $750 value and $50 or $100 in grading costs will get you that $750 vs. $350 or $450 instead I'd say do it. If the difference is the grading fee, maybe it's not really worth it and just better to sell it for $650 or $700 instead and let someone else gamble on the grade they give them. Also depends on what you pay for it. Like your coin. If it would sell for $750 but you paid $750 to get it maybe just buying it graded in the first place would be better than tacking on that cost to your cost that you might not be able to recover. It's all conditional and depends on a lot of factors in determining whether or not to get a coin graded and slabbed. I have a decent amount of Lincoln cents worth in the $5-$10 range but I think it would be pretty dumb to get them graded and slabbed for $20-$50 because I'll never get $25 or $60 for it If I sell them. Anyways just my thoughts on it. I think with your coin its a grantee to a buyer it's grading ms63 and worth it near that value. If you bought it for much less it would be worth it to get it graded. As far as buyers go, it might take a while to sell it for close to its full value bUT all coins are like that. Buyers generally want a too good to be true deal, it's how it is. And sellers want to get the most for it they can, even more than its valued if possible, also how it is.