Would replacing malfunctioning keyboard solve my problem?

I woke up today to discover a line of keys down my keyboard were not responding. I've not spilled anything on my computer, nor have a dropped it or knowingly damaged it in any way. I have no idea what could have caused this.

At first, it was just the F6 key down to the N key that were not responding. Shortly thereafter, for seemingly no reason at all, more keys began malfunctioning. The entire row starting at A until L will trigger the key above or below at the same time (pressing A would result it AZ being pressed when observed in Keyboard Viewer).

I'm planning on selling this computer soon, and don't want to dump money into it unless necessary, though I also don't want to sell someone a shoddy laptop.

What can I do to determine a keyboard replacement would solve this issue before I order the part?