gfxrs.net fnny.net tund.net wrecked.us fforums.net forumsdirectory.net admindiscussion.com They all have no traffic, and should be appraised on the domain only. Thank you.
gfxrs.net - $2, random junk in the form of letters is not worth anything. fnny.net - $3, if there was a funny.com which was a popular site you'd be getting misspelling traffic so you could pull $100 out of it probably, but there is no site for the .net so Its not worth anything. tund.net - $2 random junk in the form of letters is not worth anything. wrecked.us - mmm, tough one I'm going to say if you can find the right buyer $20 fforums.net - $15 if you are lucky, or as much as $30 to an idiot forumsdirectory.net - This one is worth about $30 admindiscussion.com - $35 but I'm thinking there is a good chance that someone who wants it would really pay $50 for it.
GFX stands for graphics. So it would be graphics R S. Like toys R S. So its not just random letters in anyway. fnny.net is not only a four letter domain it would be a great domain for a website for jokes and such. tund.net isn't a great domain however it is short four letters, and its not hella random. Those three I completely disagree with not only with what you said about them but also the price you appraised them for. However the rest I believe to be fairly accurate.
Domains are worth more mostly because their name is excellent for seo and ranking. Google won't bump fnny for the keyword "funny".
You have to take into consideration that you cant just go buy a 4 letter .net domain in any formation though. Let alone one that actually looks good, and isn't too random. I guarantee there isn't many if any available 4 letter .nets.