You might be wondering if it is really worthwhile buying online as there is the freight to consider. But don't forget that your bricks and mortar stores also have to pay freight on the parts they get - and they then pass that cost on to you, as well as their other overheads. By buying parts online you can often get steep discounts as online stores do not have to pay staff or rent for a shop front. And often they will give you free freight if the cost of your purchase is over a certain amount.
If, however, you're having trouble putting your finger on exactly what the problem with your machine is, it can be nearly impossible to devise an appropriate washing machine repair plan. In that case, you have three options: Put up with the problem and hope that it goes away, Get rid of the malfunctioning unit and purchase a brand-new one; or, Find a washer and dryer repair technician who can help you diagnose and treat the problem. Obviously, there are pros and cons for each of the scenarios outlined, so it will be up to you to consider your budgetary constraints and any other important factors before making a decision.