Mammoth Performance Pocket 1600 Double Mattress (Eltham SE9)

Mammoth Performance Pocket 1600 Double Mattress (135 x 190cm)
This mattress has had about 5 years of use by myself, it is clean with a removable topper which will be washed prior to collection.
There are no stains, or marks apart from a dark smudge where I believe a hinge rubbed against the mattress and transferred a little paint. This mark is on the bottom side of the mattress and not visible when placed into a bed frame.