J.C.
$100? Yikes!
Have you tried the Avon Alternative Intensive eye cream?
http://shop.avon.com/shop/product.asp?pf_id=30492&fro...
It's a much better value and was designed specifically for dark circles. Can you tell I dabble with Avon? If you don't have an Avon rep, private message me your mailing address and I'll stick a couple of samples in the mail to try before you buy. And unless you are within walking distance, I don't really want the order! :) (All Avon products are 100% guaranteed, so if you end up ordering, from the website, or from a rep, you can get your $$ back if you don't like it)
Good luck! I hope you try it and like it!