I'm undecided whether to pull the Crucial M4 512GB SSD out and put the standard HD back into 2011 17 MacBook Pro for sale or not? Is it more marketable and easier to sell MBP with SSD? Or most of the buyers for used MBP tends to look more into value based as oppose to performance? Is it better to sell SDD by itself? (I'm aware that it has dropped to $399 and that's fine) Not to digress from this thread topic but I'm also wondering about not selling the SDD and use it as an external backup via thunderbolt. Are there any bottlenecks in this setup that makes it closer to HD external setup? I will keep it if it works a charm with the TB Display and rMBP. I wish I could do a lot of research and experiment a bunch of set up but I'm pretty short on time for now. If you have any experiences or opinions, please share.