Bikes in general are a ripoff. I wonder if it's because they sell poorly so the prices must be high or it's just some sort of monopoly (perhaps tied in with the bike theft mafia) :D
Particularly given the fairly smooth ramp from Walmart special ($100-200) through to entry level "good" bike at a sporting goods store ($300-600) to an actually-good specialty bike store bike and ultimately pro-am ($800-$2000+). And across all these tiers, there's typically a robust second-hand market in most places, though at the higher levels you'll find it via local riding club forums and so on rather than FB Marketplace.
It's an industry that could use some disruption. Maybe it's too old-school a business though, and the margins are too low for today's entrepreneurs.
The batteries are sold at a massive markup.
I also find standing up for my 15 minute commute far more comfortable that the hard saddles that seem to be in fashion on bikes these days.