It is hard to do, and it is harder for these folks to understand that paying for quality is cheaper than going for the lowest price. A $500 washing machine that lasts 50 years "costs" $10/year (after 50 years you'll have to replace it with another one). A $300 Washing Machine that lasts 10 years costs $30/year. Or conversely a $300 machine that lasts 10 years will be re-bought 5 times over a 50 year period ($1,500), but a $500 machine that lasts 50 years will be bought once ($500) over a 50 year period.
So buying the "quality" machine actually stretches your paycheck further because you won't be re-buying a machine in 10 years.
Of course it is really hard to help people understand that math, but once they do they can find a whole lot of cost savings in their lives.