I know quite a few fellow watch collectors who have picked up
Invictas, and from the reviews it seems quality control's a bit of
a hit-and-miss thing with them. In particular, crown and seal
failures are not uncommon, so I wouldn't count on that 100-metre
water resistance.
I tend to measure value according to the longer term. For
example, this old 6309 is the forerunner to the SKX779. I
picked it up for $150 in 1987 and it's still ticking along merrily
today:

This watch has been constantly on my wrist through airborne
drops, scuba dives and conditions that typically killed G-Shocks in
four months or less. At less than ten bucks a year and
dropping, I'd call that value.
waaaaahhhhhhhhh................amazing leh.................too
bad lah, all the nice Seiko designs don't come with auto or
kinetic..................as for quartz, water resistance seems to
suffer whenever it's time to change the battery...............
by the way, how often need to adjust the time for the Seiko
automatic? once every few days ?