If she is a nice person, I would enjoy talking with her. After a while with that I would learn if I was attracted to her personality. If so, I would attempt to date her. After how ever many dates, if we got intimate, then I would already be at least somewhat committed when I found her stretch marks and saggy boobs (I hope she has saggy boobs and not saggy books, lol) At that point, it really would not matter. I would already be in the relationship and enjoying that relationship, so those other things would be of no concern to me.
Depends on how fucked up these stretch marks and saggy boobs are. I'm the biggest advocate of face>body, but if she's a walking stretch mark and has old woman titties then I don't know if I could deal with having to tie myself down to that body for months/years.