BARGAIN! Brand new memory foam kingsize mattress (currently on sale in Argos for £279) ?

Bargain price as I would like this item out of the road. This item is available on Argos for 279 (item code 196/1382) at the moment and I am looking for 140. I am selling this as I won this item from Argos but do not require it. At the moment the mattress is in a vacuum sealed state (as it was delivered) and is sealed in original packaging. According to the instructions you have to take it out of packaging, unroll it and leave it for a couple of hours before use. It has never been used or opened. It is memory foam material and is medium firmness. Dimensions: 150 X 200. Body weight is evenly distributed when you lie on mattress which will help support spine etc. There is also a special cover on mattress which protects against dust mites/bacteria. Picture shown is one I have got off internet as my mattress is still in packaging etc. Can be collected in Girvan and will be easy to transport as it is in a box which measures approx 5ft by 1 ft.