Well..A newbie's voice here..
I know why the guy took this domain..
because he thought that it's very brand-able and can fetch
a lot like the domains listed below-
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royer.com $2,605
envis.com $3,888
katel.com $3,088
ezgym.com $2,750
vidmo.com $2,488
edist.com $2,288
Weeve.com $2,100
tippo.com $2,000
Bonzy.com - $706
Koosy.com - $771
iDose.com - $400
Blaxy.com - $444
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but to me, predicting a price for LLLLL.com is very tough unless you are a very experienced domainer.
A lot of such domains are dropped daily.
So unless you have a fat pocket -stay away from 5L.coms..