domain cd-key.net

For me, the hyphen + dot net = $RegFee
Maybe you know something I don't...

In this case the hyphen works out fine BUT there are three reasons to drop it imo

a. the .com version is parked (which shows that no-one is really interested)
b. there are a lot already very well known established sites to find keys
c. you're looking to sell this name to someone that sells illegal stuff (keys for cracked software) right? I try to avoid such names tbh