Product review (4 stars): Inexpensive repair
If your dryer is squeaking, it's most likely due to worn teflon bearings.  Save yourself a boatload of money by replacing them yourself.  If you know how the front of the dryer comes off, it's a 10-minute repair job.

These bearings -- although listed by the manufacturer as the correct replacement part -- are not an exact fit.  They do, however, work.