For a tenner, probably worth it (provided they fit). The LPL is a Linear Polariser, so should be ok (circular polarisers are meant to give fewer problems with auto-focus).
The close up and ND filters will be useful, but the rest are effects filters, which can be simulated easily in Photoshop without degrading your image quality.
Check them for scratches, dirt and dust. Don't expect them to be brilliant, but you might be lucky, especially if you spot some decent brands (eg HOYA, Kenko).