Really, it all depends on what year of MacBook you have. Yes, getting a recent model logic board is expensive. And, there are many places that sell refurbished logic boards with faster components than our current model. I suggest doing a thorough search of components for a DIY setup if you're out of warranty, don't want to pay for a new machine, and have a knack for unscrewing the cover off and unplugging some wires. Ifixit has some great tutorials.