I have been reading this with interest. I sell stuff for a living and am well aware or product liability issues, providing customer service etc. However, I am surprised at the fuss being made here. it is evident that the seller did not knowingly sell a ‘faulty’ item. And the buyer did purchase a knowingly used item, and not somthing like a seat post or stem, but a wheel with a fairly complex (and service) components. The important point imo is that there was no fault present at the time the transaction took place.
When buying used somtimes you get a real bargain and sometimes you may have to put your hand in your pocket…….. still much cheaper than buying new (with which you get your warranty and buyer protection !)
Thats life I’m afraid ! it’ll work for you as well sometime. (if it hasn’t already)