It is not difficult to buy washing machine parts; however, it may be a little more difficult to pull that machine down and find out exactly what part is broken. If you are a true handyman, then this may not be anything to worry about, but for those who are not used to anything mechanical then it could pose a problem. The best thing to do is to get that repairman in to do the job and tell you what is needed.
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.