I recently got a reconditioned Lenovo Thinkcentre M910q - without monitor, keyboard or mouse. Somewhat haphazard purchase, as I was unfamiliar with this Tiny Lenovo, but the key to making a good purchase may be the monitor.
I'm not sure how compatible all the Tiny range are with newer monitors - my Tiny has a product ID 10MUS4B600 and MFG date 1712.
The monitor (not now linked) is in my price bracket - it should be compatible, right
[edited to remove an old link]