This is on sale right now. Seems to have good reviews
https://www.amazon.com/Vision-Scientific-VS-5FZ-IFR07-Trinocular-Magnification/dp/B01KVN2I0A/ref=mp_s_a_1_13?crid=1S1C72QALJFCH&keywords=stereo+zoom+microscope&qid=1668642531&sprefix=stereo+zoom%2Caps%2C123&sr=8-13