Not needed. By the end of the year- the games all almost all universally $19.99 or less (and worth less than that once the year new game releases).
There's no reason to make a SKU for an old that's generally been rendered obsolete by its successor 12 months later.
Maybe some ultra-rare exceptions, where a very specific game/year in franchise ends up standing above the rest- NHL '94, NFL 2k5 come to mind. But that's REALLY rare occurrence.