Engadget
Your old phones may be worth more than you think through Google Store trade-in

Google’s trade-in program for the Pixel 11 line gives credits ranging from $100 for original Pixels to $150 for Pixel 4a or Galaxy S20, up to $600 for Pixel 10 Pro, depending on condition and model. Credits may be applied instantly at checkout or after inspection. Trades are processed online with a prepaid shipping kit and require confirming the device’s make, model, storage and condition.