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.