Remarking is a stupid thing. The 6582a's have very sharp edges, indicating that they were indeed sanded down. I would rather buy obviously used SIDs, at least you know the markings are correct (didn't know they made SIDs back in '54 - truly ahead of their time, lol). Anyways, two of the four SIDs I ordered have defective noise generators. >:( Maybe not the most important feature, the filters and other stuff still work, but you should take more care when testing them - maybe offering the defective ones on discount. ;)