I sell my Fairphone 1, used only 1 month each year, as it has Dual-SIM, on holiday. Battery is healthy, was regularly maintained charging/discharging. Excellent condition, three little traces on white frame around display.
Following the idea of sustainability and fairness I will ship the phone (at my expense, in original packaging, in Europe) to the first person who donates € 150 to a generally known good cause (Greenpeace, Amnesty International, WWF, etc.) and gives reasonable proof of this actual payment (“For Fairphone Urs”) in a personal message here.