As of 2025, used Rev 2 copies sell for roughly 15-20% more than Rev 1 on eBay and European retro markets like CeX or Leboncoin. Why? Because Rev 2 is rarer (produced closer to the end of the 3DS lifecycle) and includes all patches without requiring an online download (which matters now that the 3DS eShop is closed).
If you own a physical European cartridge and want to check if it’s the Rev 2 variant, follow these steps: Tomodachi Life -Europe- -EnFrDeEsItNl- -Rev 2-