Hi,i am living in Ar-Riyadh,Saudi Arabia with my family.?

You need to apply for a SAB bank card because they have deals with a lot of the major stores here for installment plans. I do think that Extra offers them but you will need to go there and ask. If you want cheap appliances then try www.expatriates.com people here in Riyadh post good quality things that things that they don't need anymore for very low costs. Try it out and I hope you find what you're looking for.