Please appraise this domain name of http://www.nflsuperbowlads.com. I want to develop it but am unsure because of trademark issues. If I made it a fan site, would that be okay?
Maybe $1 or even not worth a dime given its inherent trademark risks. You can actually still turn it into a fan site...without hints of commercial use like ads.
NFL will crucify you if you use it. I used to work for a sports memorabilia company and we couldn't even use the word "Superbowl" in editorial without having to pay a huge licensing fee.
Some trademark holders don't actually reply back directly, although it's nice if they do. However, they could send you a letter later on "asking" you to turn over the domain name or else. The worst case scenario you can expect is a trademark holder suing in court without even sending a cease and desist letter to begin with. Be (a)ware.
That wasn't a good idea. You might not get a response from them, maybe from their lawyers instead. Or they might just ignore your email. It's got potential TM issues, so I would say $0