Deal is still working early Friday morning but could end at any time

$20 off a $100 purchase @ ebay

Enter code CMADNESS10 during checkout (expired)

you can now also use CMADNESS20 during checkout !

You can only use it once per ebay+paypal account and there are exclusions like not towards gift card purchases.

Unlike other ebay offers, this appears to be for everyone and not only "invited" members.