Concho, I undertand your pain, but I think you didn't know that certain game cartridges have become hard-to-find and/or rare to exclusively be sold after the demise of the "Analog Era" and the advancements of emulators and roms nowadays, which is why Persona's price is pretty reasonable for a Brand-New (Mint?) condition SNES Castlevania cartridge. As he said above, most cartridges of this condition can go from $80-$120 on online and gaming retailers!
I'd buy it to add to my serious stash of game collecting TBH if I weren't to be collecting PVC/resin figures, LP vinyls, anime in general, and if I were to EVER continue on my huge Famicom collection again.
Sorry bout that, P! :\