Just be aware that zchuyot on appliances only apply to very sprecific things (IIRC Israeli made) and may not be the best quality.
There is a store in Bnei Brak called Tzoref http://switch-elc.co.il/%D7%AA.....7%A3/ which has good prices.
Tell her also that stores are very pushy when trying to sell because they often work on commission, so she should get a printed estimate of the product and compare prices without pressure to buy on the spot!
