Hello, I am seriously looking in to buying an M5 and have seen a few for sale that have had engine and transmission rebuilds anywhere from 100k to 150k. Is this normal?? My 528e has 274 without any rebuilds, but I know thats comparing apples and oranges. I just dont want to drain my savings on an M5 and then have to materialize more funds to rebuild the engine and transmission. What are your experiences? Thanks Ryan