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post/bigweb/v1/card2 credits
One BIGWEB product in full: sale price and stock, what the shop pays for it and how many it takes, description — plus the same card in its other conditions on both sides.
Working example
Parameters
A BIGWEB product id (a row's `id`) or a bigweb.co.jp card URL (/products/<game>/cardViewer/<id>).
Also return the same card (same name, number and set) in its other conditions, on both the sale and the buy-back side. Each condition is a separate product at BIGWEB.
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