To be fair is Red Dead Redemption one of the masterpiece all time great games that are actually worth it even at full price? Its also better then a vast majority of 60, 70 dollar titles.
Though Rockstar are being greedy as fuck also with the pricing. Nintendo would do the same for an Ocarina of Time Remake, and did do it with Metroid Prime Remastered.
Ditto Resident Evil IV Remake, Demon Souls Remake, Persona 3: RE, Live A Live HD-2D Remake, Star Ocean The Second Story R, Command and Conquer Remastered, Diablo II Resurrected, Tactics Orge Reborn, Trials of Mana ect.
Or even Dragon Quest XI S: Echo's of an Illusive Age and SMT V/Vengeance where you buy the original you get screwed since you still need to buy the new version because there's no upgrade path.