I think my bearings are shot on the back wheel. Anyone know what sounds would be like? And is it expensive to have repaired?

 

There might be a clicking sound when you roll the back backwards or forwards. As far as price--it ain't gonna bankrupt you. Prolly less than a new tire.

 

With the wheel removed,you will feel roughness when turning the bearing and or will be very hard to turn.There may even be evidence of the seal leaking.

 

It's easy to repalce...yourself for around $40 or found yourself a good indy for around $100 bills.