The first replacement cost me $300, each subsequent replacement was apparently covered under the replacement warranty, I probably lucked out in the last logic board replacement since I'm pretty sure it was out of the replacement warranty time frame but I was never told to pay more. The guy that replaced my mbp with the retina also threw in a disk drive for free. Pretty good outcome I think for half a year of back and forth
That's definitely a great outcome, considering it's basically a $300 upgrade to a rMBP. If I knew that would be the outcome for me, I would probably go for the logic board replacement vs. finding a place to reball the GPU for a little less money. I would just be sure to keep my MBP 17 on discrete GPU 24/7 to make sure I stress tested it enough before the warranty on the logic board expired. My big fear is paying more for the logic board replacement and having it fail outside the warranty period with no recourse. I don't want to have to pay $300 multiple times!
Very happy for you and your outcome. Congrats!