How can I fix my broken windscreen wipers, Vauxhall Astra 1.6 Sport 1999?

Ever since we got our Astra 2 years ago the windscreen wipers wouldn't work on intermittent, only normal or fast. Even then, you had to stop them at a certain time or else they'd stop right in the middle of the windscreen.
This week they've stopped in the middle of the windscreen and won't function at all now.
I'm guessing the motor has given up??
I've contacted a breakers yard who quoted about 40GBP for a new motor and linkage but wondered if this is something that can be easily fixed by myself to save some pennies.
Any hints?
Many thanks