Custom mattress 77x 60

Hello I have a custom mattress for sale it’s from the natural sleep comfort range and it was purchased march of last year for a spare room that was only used twice since purchase and the reason for selling it is because we are now converting half the room to an office and the bed is just too big,it’s immaculate condition and we initially paid 1120 euro for it and would like to get 400 euro, thanks