@valuepricedgames
From what I've read from other sellers (as well as from eBay employees from many years ago), the idea of an itemized eBay catalog gradually evaporated over the course of time, as more and more sellers began demonstrating to eBay that such a catalog of product identification numbers (matched to individual products) was simply impossible, due to the realities of how UPC, ISBN and other manufacturer identification numbers are created, deleted and recycled.
Each UPC and ISBN number is composed of a limited number of digits, which are individually broken down to include a location code for the manufacturer, as well as a special identification code specific to each manufacturer, plus a special identification number for each individual item (or group of items), plus additional digits to denote other identifications. In other words, inside each UPC and ISBN number, there are only FINITE numbers available for the items themselves.
Obviously, for larger manufacturers who produce thousands of new items annually, the limitations of the UPC and ISBN numbers become a liability; thus, on a regular basis, scores of UPC and ISBN numbers are regularly deleted, and just as regularly recycled to other, newer products (many of which may be totally unrelated to the previous item).
For example: For nearly 13 years, I was employed at a huge national bookseller chain; and, every couple of weeks, several of us would be handed a stack of computer print-out sheets, each sheet holding over 50 ISBN numbers which the publisher was deleting. We then had to hunt down all of the items matching those ISBN numbers, and ship them back to the manufacturers, where the items would either be destroyed or shipped out to cut-rate wholesalers.
So, for example, I might be responsible for locating over 600 different ISBN numbers every two weeks -- or over 1300 each year. Multiply that by about a dozen other employees, also hunting down their own stacks of "deletes" -- and you're talking about over 150,000 deleted ISBN numbers each year!
Simultaneously, the manufacturer would delete all those ISBN numbers from their catalog, as would we. A few months later, the ISBNs would reappear -- but on entirely different items.
Hopefully you might now be able to understand why a specific eBay product catalog is simply unfeasible: considering the inherently flexible nature of UPC and ISBN numbers (as well as other manufacturer identification numbers), such a catalog is not only improbable, but wholly and unnaturally impossible.
