[rorykoehler]

Often it's a false economy. Dish detergent for example... the more expensive stuff is often far thicker concentrate and lasts many times longer than the cheap stuff.

[Symbiote]

I assumed they meant the cheapest among similar products, e.g. choose the standard brand on the BOGOF offer this week.

[stephengillie]

Buy the cheapest one the first time, and use that experience to judge if you need a better one next time.