IKEA Hovag Double Mattress (Glanadda LL57)

IKEA size double mattress, with wooden frame. Mattress was used for a year before we got it, and we have used it for about 2 years. The mattress is a bit stained as you can see from the photos - it came to us in that condition but we have always used a mattress topper with it. There is a fire label on the mattress. One slat is broken (see photo). It is quite comfortable, but I have been offered a smaller antique bed hence getting rid of this one. Whoever collects will have to dismantle it as I got a friend to help me with that when we picked it up and I don’t know how to dismantle it!