they do update it.
You must keep in mind that their prices are for bad quality domains.. such a qyz.com. they tell you to multiply it by 4 or 5 for premium letters.
Another thing to remember is that those are wholesale prices.
Here's a few recent snapnames prices.
nwm.com $8,000.00 (still open)
nma.net $2,511.00
tdn.net $3,350
gek.org $825
yhb.com $4,200
ipq.net $525
hut.org $3,433
qbb.com $4,033.00
uep.org $376.00
nwo.org $825.00
ovn.com $6,500.00
ovn.net $2,000.00
nrr.net $525.00
ikl.net $825.00
sep.org $5,300.00
zmi.com $2,300.00
bsh.net $1,900.00
kju.com $4,500.00
hjo.net $625.00
zrc.com $3,400.00
ayg.org $415.00
502.org $310.00
zdz.org $251.00
oku.net $1,050.00