UPDATE 2: Tesco has changed its mind, it appears. At the bottom of its website it says, "20% off selected gaming consoles, excludes the Nintendo 3Ds."
Tesco's T&Cs, under section one, divulge this disappointing nugget: "If, by mistake, we have under priced an item, we will not be liable to supply that item to you at the stated price, provided that we notify you before we despatch the item to you. In those circumstances, we will notify the correct price to you so you can decide whether or not you wish to order the item at that price. If you decide not to order the item, we will give you a full refund on any amount already paid for that item in accordance with our refund policy in section 7 below."
UPDATE 1: Eurogamer has just got off the phone with the Tesco press office, which said this is very much a real offer. Go nuts.
ORIGINAL STORY: Gargantuan supermarket Tesco is selling the Nintendo 3DS for £158 - £40 cheaper than anywhere else.
Tesco has the Aqua Blue model listed for £157.60, reduced from £197.
Order now, Tesco says, and it'll be delivered on 25th March the day the Nintendo 3DS launches in Europe.
The price of the Nintendo 3DS has been a controversial topic since Nintendo announced it was up to shops to determine what they would sell it for.
Most went with £230 at the time, although £200 is the going rate at many shops.
Speaking to Eurogamer last month, Nintendo UK boss David Yarnton said: "It's still really good value. The fact it's a 3D entertainment device you can't get anything that's 3D at that sort of price without having to wear glasses as well. Get that one in."