I've been out of serious Durant collecting for a few months, but I know when I was rolling, I wouldn't have paid anywhere near $3500 for that one. I'd rather have the base /99 (even with a 1-color), Number Pieces, Autograph Patches, and Limited Logos than that card.
When I post a price, I will not respond if you ask for a "best price" of if I "can do any better." If you want a better price than the one posted, please counteroffer.
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