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A typical integration https://developer.channeladvisor.com/a-typical-integration  Note in this image all deals are tracked in channel advisor....

Deals are turned on in a marketplace when a Flag of the marketplace is added to the SKU.

Channel advisor flows

Labels (eBay, Amazon Seller Central - AU, etc ) - trigger a rule (signing of a template) to put the product live - until inventory reaches qty of 1 (or date) . Different rules can be setup 

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