Hi, I am going to be in the market for a used MBP 15" this summer. I'm looking to spend less than $1200. I'd ideally like a 2011 or newer, and I'm fine with non retina. I know a lot of these machines have graphics card recalls and issues. Which years should I avoid? Do ones with discrete graphics have higher rates of logic board failure? It's not going to be used for anything serious, so anything 2011 or newer should be fine.