Yep you're not wrong. There did used to be a sub section with a "What's it worth" area but AFAIK that was decommissioned a while ago (2014?).
Generally I think "what's it worth?" threads for Zeds are now allowed in the general sub section areas for the specific model. E.g. "350Z General" for 350 Zed WIW threads and "370Z General" for 370 Zed WIW threads.
Just try to remember to put as much info as needed (like mileage, FNSH, mods etc etc) as well as some pictures for people to try to gauge a rough estimate for you on how much they think it's worth. Good luck.