I used to learn piano when I was little and now I'm considering to start again as a complete beginner. I don't know how long this is going to stick so I'm going for a used instrument.
I found a not-so-local list for a used Korg SP-250 for about $250. I only have the photo of it avaliable to me right now, and it seems that it has suffered some cosmetic damages (dotty stains on speaker grille, scratch on far right keys and chips that I've not been able to identify from the photo but seller mentions it). The seller claims that everything functions okay.
A quick research says that Korg is a respected brand in keyboards and this model is quite old. (Amazon last sold one in 2015 and it was discontinued) In fact, the age does make me a bit anxious. I do not know much about keyboards and I don't have anywhere else to turn. This is from a private seller, so there will be no way out if things go south.
Since I don't know how to interpret the spec-sheet, what is this keyboard, and is it okay? What should I look for, test for, and which questions should I be asking the seller?