hmm, well I'm generally not keen on these, but your post has gotten me thinking:
if your business name already has a hypen in it, OR if it is comprised of exactly two words and the regular LL.com is already taken, then the L-L.coms could be good.
that said, $100 sounds a little sp8^X8^Xky to me, if you don't have a buyer in mind already
my two cents...