Is a used AirPods Max worth it if the battery is old?

A used AirPods Max is only worth it with an old battery if the price is low enough to cover a likely battery service. As a rough rule: pay about $250–$330 for an older Lightning pair in good cosmetic condition, and treat anything near $375+ as questionable unless the battery is confirmed strong, AppleCare+ is active, or accessories/condition are excellent. If the battery is clearly weak, aim closer to $200–$260 because Apple battery service has historically been around $79 in the U.S., but you should verify the current fee before buying.

Best practical advice: buy only if you can test them first. Check that they hold charge, connect reliably, have no condensation/corrosion in the ear cups, the Digital Crown and ANC/transparency work, and the serial number/AppleCare status looks legitimate. If the seller says “battery is old” but can’t describe real battery life, assume you’ll need service soon.