They are not dead.

Please note, under the GameStop section, each game states "Online-only" or "In-store".

(when in-stock) refers to Online. Technically, Muramasa could come back in stock, online, at any time.

If you can find MUA2 at a GameStop near you, similiar situation.

Trade-in Values are still the same on those two games. (And on that note, if in the case of MUA2 (PS2) showing up in stock ONLINE, then one could actually flip it better. With CAG16,SAVER, and Edge, the online stock of it would come out to a little less than ~$17.00. Just a heads up.)