Not a bad price at all.

Installation:
- Inside the car on the inner part of that piece there is a black triangle. It popps off, just pull on it.
- There are 3 10mm nuts, remove those
- The outer portion will now come off. You may need to remove the studs from your old covers to put on the new ones. If so, just use the double nut trick to remove the studs and install them on your new covers.
- Repeat above 2 steps to install.

Simple.