Ask your friends and family as well. Someone has an old laptop/desktop from school or an old job stuck in a closet. A lot of people give up when their machines become too slow, but they don't bother with basic maintenance to see if that will speed it up: virus checks, uninstalling un-needed programs, clearing caches, defragging the hard drive, etc. I have one friend ditched a PC because it ran too slowly and when I checked it out they had two antivirus programs competing with each other, making it impossible to do anything else. Other people take the fact that the battery or charging cable died as a signal to get a replacement.