you have a lot of money for vanity domains :-) if you sell those for under $500 you will be at lost considering the buy value, however, this "market" doesnt seem to appraise a domain to its rightful "vanity" value, for eg. i own linuxsex.org or killall9.org but guys here were telling me a .com with that would have more value, not to me though, so maybe you see what i mean my advice, build something on them that would appeal, for eg. omg.ws/check-this-is-insane.png, funny pics hosting maybe.. or vanity email, irc etc.. just my opinion, i might be wrong