it is a sort of market where people sell different types of goods they no longer want or use.
they have been studying the shopping habits at car boot sales.
they usually take place in summer, but in some parts of the uk there are sales all year.
they have been thinking of selling some of their old junk at a car boot sale because they want to raise some money for their holidays and get rid of old things.
they have been wondering about when the best time is to do it, what sells well, how to price their goods and what sort of profit they can hope to make.
they were surprised how little people were prepared to pay.
they have started to sort their things out into labelled banana boxes and they have made sure they have got change.