Few weeks ago I came across a cheap Nikon J1 (30€ with shipping) and I did some tests. There are a few things I love about this "old" camera like full electronic shutter and glass filter in front of the sensor (no dust) but also some things I do not like; no video without a nikon 1 objective and does not reflect the changes in exposure on the screen, you need to take the shot and check
First a small diatom (I guess is a diatom), Nikon CFN 100/1.25 Oil on Olympus BHT; direct projection stacked from 50 images and 30% crop.
Then a single mosquito wing scale, same lens around 30 images. 50%ish crop
I only have a swing out 0.95 condenser, will have a 1.25 abbe soon. Maybe some extra detail could be get with it.
Images made through a microscope. All subject types.