Lead with every component and quantity. Identify size, model, or colour where a choice changes what the customer receives, and state whether substitutions are possible. Photograph the actual set, with small accessories arranged visibly; a pile shot can conceal what is missing.
Use a count sheet for the parts, not just a single total. If components are also sold separately, reserve them when a set is held and update the remaining quantities after either kind of sale. Mark supplier-expected parts as pending rather than in stock, and change the offer when a component cannot be supplied.
A bundle makes selection easier, but a fault in one piece can raise a question about the rest. Explain how you would handle a partial problem, and whether a buyer can decline substitutions, before agreeing the sale. Customers can then compare the complete set with their own needs.
