$x reseller
$xxx enduser
The enduser value is of course in the case you find one which is not sure. I think this kind of domains are not so easy to sell, two hyphen, not so good.
Taking a look at namebio, I found these past sales for the pattern l-l-l. They are very few, although surely there are non registered sales, but whatever, this gives an idea that the demand or acceptance is very low
f-a-y.com $1,705 2013-03-27 godaddy.com
g-p-t.com $1,200 2012-09-27 sedo.com
p-p-o.com $850 2012-09-14 namejet.com
t-m-t.com $1,000 2011-05-27 sedo.com
c-g-a.com $1,000 2011-02-10 sedo.com
a-m-g.com $3,688 2011-01-17 sedo.com
e-a-w.com $670 2011-01-15 sedo.com
p-k-r.com $500 2011-01-11 sedo.com
a-m-e.com $5,000 2011-01-09 sedo.com
m-b-w.com $1,500 2011-01-08 sedo.com
u-n-a.com $861 2008-04-30 namejet.com
b-i-d.com $711 2008-04-19 namejet.com
k-i-d.com $995 2007-10-23 afternic.com
c-m-m.com $2,500 2007-03-21 BuyDomain
m-o-i.com $2,500 2006-12-04 BuyDomains
f-h-s.com $700 2005-03-17 Afternic
Although there are sales for "x,xxx" I consider them not so problable, that is the reason I gave you an $xxx enduser value for considering more probable and at the same time a good amount according the name, but again not sure a sale, that is tha bad part
Just my opinion, good luck