Casio AP 25 queries

[Curufew]

Hi all!


I've just started out learning how to play the keyboard (learning from book) and one of my camp mates told me that he has a Casio AP 25 that he had only used a few times and is willing to sell it.

So my question is, what's the market price for a second hand Casio AP 25?

I'm not sure whether I've started this thread in the correct forum. Sorry to the admins if I do.

Thanks and regards!