You just have to research the new owner and you will see there was a reason he purchased it. Its not just a random LLLN purchase, the new owner also owns CSIStLouis.com so they obviously wants to use the "CSI" combination again, possibly to shorten his existing domain or start something new...just guessing with those reasons though..
A few other nice sales in this format, but most of these you can see why they had higher prices
pay4.com 25,089 USD 2016-11-02 Sedo
fun8.com 25,000 USD 2014-04-22 Sedo
net4.com 14,068 USD 2011-03-22 Sedo
bet7.com 12,011 USD 2014-01-15 NameJet
vns8.com 10,200 USD 2016-07-21 NameJet
dna1.com 10,000 USD 2015-02-08 Uniregistry
big2.com 8,100 USD 2007-01-01 SnapNames