Knocking/Rubbing from rear axle?!

[ThRaXaIR]

hiya, everytime i turn a kind of rubbing noise eminates from the back of the car. basically it sounds like something thats turning is rubbing. any ideas what it is?! and i bet its expensive to fix! :P

[wavy]

bearings
not dear to buy

[ThRaXaIR]

ah cool, thats what my mates just said, get that sorted next then!