Very new Futon Sofa Bed with custom-fitted mattresses! in Serangoon Central, Northeast Singapore for sale

Futon sofa bed for sale - very good condition. Wood NOT damaged; hinges regularly oiled and thus NOT rusty.
Item for sale consists of:
Foldable wooden plank - can be laid flat (like a bed) or folded (see picture)
Futon mattress - can be laid flat (like a bed) or folded to match plank when folded (see picture)
The above 2 items - $400 (bought at S$800). Price negotiable.
Thicker mattress (see second picture right hand side: white block at the side) - custom made to fit plank size. Can be used to reinforce futon mattress when futon mattress laid flat. Mattress is in pristine condition (no stains, no signs of wear and tear) and has only been used once. For sale at $50 (custom made for $80). Price negotiable.