A double deal for a robot vacuum cleaner means it can be snapped up for less than £4 thanks to a clever stacking technique used by bargain hunters.
Deals website Wowcher has a robot vacuum cleaner listed for £19.99 and nearly 17,000 people have already bought the cut-price device.
While £19.99 is one of the cheapest robot vacuum cleaners on the market shoppers can get it for even less by stacking a second deal to cut the price to just £3.83.
A second deal website called Topcashback is offering £15 to anybody who signs up to the free cashback site, plus an extra 7% off when shoppers buy the robot vacuum from Wowcher if they are also a new member of Wowcher too.
That means new members of Topcashback can get the robot vacuum cleaner for just £3.83 after cashback here.
However, the deal does not include any costs of postage and packaging.
While a robot vacuum cleaner for £4 is a bargain deal the device listed on Wowcher is unbranded and as such there is no indication build quality and suction will be enough to clean the average UK home.
It is unlikely to compare to the Mirror Choice for the best vacuum cleaner on sale in the UK today, the Proscenic M8 PRO.
Our reviewer described the Proscenic cleaner as: "An impressive cleaning experience for the modern home.
"Thanks to a 280ml dust tank and 300ml water tank, the vacuum cleaner can both vacuum and mop simultaneously to save time. You'll get a maximum runtime of 120 minutes under the silent mode."
The £375 robot vacuum cleaner is available on Amazon.
If that is too expensive our reviewer also praised the Eufy RoboVac 11S, which "is quickly becoming a force to be reckoned with, it boasts some top of the line features and has a price bracket to rival some of the top names in the field."
The Eufy is more affordable than the Proscenic and is priced at £274 on Amazon here.
