I personally would stay away from it…and I certainly would if the risk I was taking was only worth 10% off new (aka - no risk)
I can somwhat understand if you are getting a good, used clutch for like $50-$100 and you are really light on cash…but 10% just isn’t worth it in my opinion.
With big jobs like that, people usually install new parts because they don’t wanna go through the hassle of taking the tranny back out if there’s something wrong with the part.