Getting Sainsbury's to refund the difference

Doubt it! What would you do if you were Sainsbury's, and someone tried that trick?

If it's not faulty, they don't *have* to take it back. If they *do* take it back, it will have to be in original condition - seals unbroken on software discs, none of your data or customisations on hard disk, etc. [Yes, I *know* you want to keep it and just want your 20 - but they would probably have to do a full refund, and you would have to re-buy it. Once you've got your money back, they can't *make* you buy it again - and they may be unable to sell it to anyone else.]

I base my comments purely on what I was told by the chap who had to get the unit from stores. I first went to the CS desk to ask if I could look at one of these laptops (they only had empty boxes on the shelves, and wanted to see one 'in the flesh' to help me decide on the purchase). When chap appeared he said 'no', they couldn't open a box to show me 'as it would break the DPA'!! However, when I raised the point of a 28-day return period, he said that I could use the PC for up to 28 days ('do what you want with it') and return it 'as long as it's intact and not damaged')

Given that I'm going solely on the word of someone who seemed to think the DPA was in some way relevant, I agree there's room for doubt on what he said, so was interested to hear from anyone else who'd returned similar items.

Simplest thing, just ask them. It won't kill you.

Generally, if you buy something at a certain price, you cannot change your mind and demand a refund just because you have seen the same item cheaper elsewhere. This case is slightly different because, as part of the contract of sale, you were told you could use the PC for up to