I know it's not difficult to find skull jewelry on the interwebs but you probably already know that I value quality and affordability. I'm a big fan of Eve's Addiction, they have a great little collection of silver skull jewelry that fits the bill.
I already have the necklace and earrings pictured below. I wear the earrings almost every day, they never tarnish are are strong and sturdy after over a year of use. And I always get compliments on the necklace.
The rest of this stuff is on my wishlist, ESP the skull keychain. My birthday is coming soon...
Check out the site for more items and better pictures.