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post/cardlabo/v1/card2 credits
One Card Labo product in full: price, stock, purchase limit, the set and category it is filed under, its stated condition and images, plus what the shop pays to buy the same card back when the buy-back site lists it.
Working example
Parameters
A Card Labo product id (a search row's `id`) or a c-labo-online.jp product URL.
Also look the card up on the buy-back site and return what the shop pays for it (one more page). Matched on the identical title only.
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