That's on publishers and market to decide, there are (and shouldn't be) rules regarding gaming prices. If seller offers at $60 and enough people buy, the price was set correctly, which seems the case for most Nintendo games. We all want cheaper things, I get it.
BTW, re-releases at full price are still new games to many of us, there's this SMRPG Remake, there's the Star Ocean game, there's the Pikmin 1&2 game, of those games I'll pay full price for two of them, and probably wait for a sale for the other. I'm pretty happy with this trend of remastering/remaking old games actually.