Independent field guide
Source Links vs Agent Destinations
One item can have a source listing without an available product-level Mulebuy link.
Source Listing
The source page anchors the observed title, image and RMB item price. It does not establish stock, quality or delivered cost.
Agent Destination
A separate destination may carry product identifiers and commercial parameters. This catalogue leaves that action unavailable unless the exact link was observed; it never builds one from a title.