Very, very little is the same.
Some bits (like the front wheel) are interchangable, but they are different - and its not like the YZ parts are rare/hard to find.
Actually, the only parts that would be identical XT <-> YZ would be some nuts and bolts...
If you want it gone, a price, and some pics will always help. Usually no price = highly optimistic seller = potential buyers just don't even bother asking.