The Galaxy S26 Plus costs £790.00 new compared with £129.00 refurbished (no longer sold new) for the Galaxy S21+. Refurbished is currently priced £49.00 higher than new for the Galaxy S26 Plus -- worth buying new instead right now. If you want Galaxy AI support, the Galaxy S26 Plus is the better choice. If value is your priority, the Galaxy S21+ offers the stronger buy at a lower price point.