We've recently replaced our rollerblind as the old one was not blackout and the mechanism needed replacing. These mechanisms are not expensive (under £5 on eBay) and easy to replace.
It might also be possible to cut down to a different size.
Condition of the blind itself is okay, although it would probably welcome a whipe clean!
Roller blind, beige, 2.66m wide (Golden Triangle NR2)
This offer has been gifted to someone and is no longer available.