~50 EUR, random no-name USB microscopes are surprisingly good these days. I use them for inspecting PCBs and SMT solder jobs. Model names seem to change daily,

~50 EUR, random no-name USB microscopes are surprisingly good these days. I use them for inspecting PCBs and SMT solder jobs. Model names seem to change daily, but they are all very similar. Standard USB video device-class, so no software necessary. I just use guvcview under Linux. Pick one that has "full HD" in the name - it's usually not true 1080p, but in my experience the picture quality is still better than the other ones that will have a PAL-like sensor in it. Also, get one with a stand where you can adjust the height of the scope above the object with a screw.