Fair question. I hope this can give you an idea:
o.co $350,000 2010-07-21 private sale
e.co $81,000 2010-08-12 sedo.com
lyrics.co $80,000 2006-02-21 Pvt Sale
business.co $80,000 2011-05-26 domainmarket.com
mesothelioma.co $76,000 2010-09-29 .co landrush auctions
denver.co $50,001 2010-09-29 .co landrush auctions
news.co $50,000 2011-12-14 sedo.com
finance.co $45,000 2011-06-17 sedo.com
duiattorney.co $44,500 2010-09-29 .co landrush auctions
duilawyer.co $43,000 2010-09-29 .co landrush auctions
thecube.co $40,919 2006-05-09 sedo.com
internet.co $40,000 2011-05-28 sedo.com
men.co $32,000 2011-08-09 sedo.com
taobao.co $31,500 2010-09-29 .co landrush auctions
music.co $30,000 2011-03-11 sedo.com
software.com.co $26,466 2012-03-21 sedo.com
women.co $25,000 2011-07-16 sedo.com
ban.co $24,500 2010-10-07 .co landrush auctions
aspen.co $22,500 2010-09-29 14. tie
shop.co $22,000 2011-05-04 sedo.com
---------- Post added at 07:05 AM ---------- Previous post was at 07:03 AM ----------
Sales in 2012. You can see these keywords are not nearly as good, but it's still selling $x,xxx
Domain Name ascdesc Price ascdesc Date ascdesc Sales Venue ascdesc
dutyfree.co $1,100 2012-05-04 sedo.com
ignite.co $1,000 2012-04-24 sedo.com
ludwig.co $3,284 2012-04-05 sedo.com
wet.co $610 2012-03-29 godaddy.com
theme.co $3,400 2012-03-29 sedo.com
cometas.co $1,023 2012-03-21 sedo.com
software.com.co $26,466 2012-03-21 sedo.com
kad.co $800 2012-02-28 sedo.com
neuro.co $1,000 2012-02-27 sedo.com
domaintools.co $2,500 2012-02-23 sedo.com
kidz.co $1,450 2012-02-14 sedo.com
league.co $2,700 2012-02-09 sedo.com
wear.co $1,800 2012-02-09 sedo.com
meeticaffinity.co $2,580 2012-02-08 sedo.com
jelly.co $2,550 2012-02-01 sedo.com
arise.co $2,500 2012-01-30 sedo.com
steeltech.co $2,000 2012-01-27 sedo.com
papa.co $1,000 2012-01-26 sedo.com
safe.co $2,800 2012-01-13 sedo.com
hawk.co $2,600 2012-01-06 sedo.com