In 2022 the US median personal income was $47,000. That's pre tax. Consider approximations with averages and marginal tax rates and take out 12% for tax, and you have $3445 per month median personal income.
The apple headset is $3500.
Take out average rent of $1350. Average credit card debt per consumer is just over $6300 in 2024, which seems high, but is also nearly twice monthly post tax income (holy crap). Average car payment for used vehicles is just over $500. I've not discussed food or utilities.
Given the above are for the average consumer, I'm not at all surprised a luxury and discretionary niche item such as the AVP has had next to no sales.