I like the 183 (I'm roughly your size. 5' 10", 205lbs) as an everyday ski, but I like the 190 for a more dedicated pow/open bowl/maching machine.
The 183 is still plenty stable, but a bit more "turny" than the 190.
Unless you are the mach looney type either would work for you.
As far as value...Goats are very in-demand skis and command premo top dollar, except for really beat skis. The s914's are also quite valuable, so depending on condition, model year and amount of binding mounts this setup could command upwards of the top range for this ski.
In the ballpark of $550-700, if in really premo shape, for 06-07' (white tops) with s914's...If less than the low range I mentioned then they are a steal.