Replacing Rear brake disc

[Fazerider]

Hi all
First I need a new rear brake discs on the advice of my mot Any recommendations,up to £80 is my limit How easy is it to do yourself
Cheers

I've had 2nd hand ones and a new OEM in the past… the real difficulty is removal of the old one.
The screws corrode and the threadlock cures until it's up to full superglue strength. They are almost impossible to extract without them shearing. I've found that welding a bar to the head dumps enough heat in and gives the leverage needed to undo them, but the screws are obviously not reusable after that. So budget for some replacement screws and maybe some mechanics time if you don't have the equipment yourself.