Something that grinds my gears to no end is when a game has multiple editions. Especially if each edition have different sales.
Take Civ 6 right now. The base game is not on sale and as such costs $60. The “Platinum Edition” is on sale for 93% and costs $13.44 and has most of the dlc. The “Anthology Edition” is on sale for 88% and costs $25.20.
The special editions are cheaper than the base game right now, which is weird enough on its own but my wishlist doesn’t notify me of this because it’s only tracking the base game sales!