You may occasionally find listings on sites like ZenMarket or Buyee (proxy services for Japan), as this model was quite popular in the Asian market.
Originally rated for ~10.5 hours; used units may have significantly less. Modern Alternatives If you can't find a reliable MDR-EX31BN mdr ex31bn buy
Sometimes refurbished units pop up under "Other Sellers" on the original Amazon product page, though this is becoming rare. Key Specs to Remember You may occasionally find listings on sites like
Check if the touch-to-pair feature still works. mdr ex31bn buy