Why an item is not appearing in your shop
A listed item is not necessarily ordinary shop stock. Some items are crafted, some arrive through special offers, and others require an enabler. A gold value alone does not tell you how to obtain an item.
Follow the required item
An item's acquisition section identifies its gate or ownership requirement where one exists. Read that relationship in both directions: from the result to its prerequisite, and from an enabler to the items it makes available. Deck of Cards opens a different set of possibilities from Chess Board.
Class, round and ownership matter
Class availability and the current round can restrict the candidate pool. Owning a prerequisite does not turn every dependent item into ordinary unrestricted stock. Unique offers, skill choices, subclass choices and ordinary rolls are separate paths.
Check crafting alternatives
An item may have several recipes or more than one acquisition route. Follow its recipe tree before spending gold on rerolls. The crafting workbench shows alternative formulas and can check ingredient coverage from a shared backpack.
Make a purchase plan
Start from the result you need, identify its missing prerequisite, and budget for that prerequisite first. Use the shop odds workbench for ordinary rarity rolls and the run economy planner for purchases and rerolls. Neither removes an item's ownership or class requirements.