[mistersquid]

> I’m wondering what kind of cleaner will take the sharpie off but not damage the cards.

If you ever were established as a go-to knowledge source for Yu-Gi-Oh or an adjacent domain, those sharpie initials could actually increase the value of those cards…

[kizer]

...good point. If I’m famous one day, the cards could be significantly more valuable.

I’m not strapped for cash (knock on wood) right now so I plan to hold on to them indefinitely, until an obvious reason to sell or give them away appears.