We look at a lot of unusual or off-beat ideas here but sometimes it’s easy to overlook something run-of-the-mill but lucrative. There’s a seemingly endless market for cheap second hand cars, and a profit to be made by supplying them, particularly if you have some basic mechanical knowledge.

Often, the only difference between a car which can be bought for £500 and one that can be sold for £1,000 is a good clean/valet, and an improved advertisement and photographs. Sell just a couple of cars each month like this and you could very easily make an extra £12,000 a year.

Not everyone is interested in cars of course, but if you are, this is a great way to combine business with pleasure.