Answer to "Keyboard (just the keyboard replacement)"It is possible to replace only the keyboard but there are tons of little screws and took me all day to do and they are easily strippable (So get a good and correct size precision screw driver). I did resurrect a 13 macbook unibody that had liquid spilled over the keyboard (logic board was safe). Bottom line you can get replacement keyboard for cheap on ebay but takes a lot of time to install. Buying a top case case will save a lot of time but cost money. FYI: I'm going to try to resurrect another broken unibody I purchased on ebay and probably post a tutorial.