It'll be about 299.00 for sure. Size, aluminium etc, it all costs.
Also, I'll say it again and again, "sound dampening" does not exist in any case. Don't listen to the hype any of these companies sell you. They just stick regular foam or "sound foam" in there which is not acoustically tuned to match the frequencies the fans emit; not only that we all change fans and unless you know which frequency the new fans and all the components generally emit then you can't even begin to guess what type of acoustic foam to put in place of the crap they stuck in there ahaha.
To keep it simple: There is no foam you can put in a case that will absorb every frequency, and there is no foam in existence that completely absorbs mechanical distortion; i.e. vibration etc unless you want to place a giant piece under neath the case between the desk or floor you're placing it on.
It really just acts as insulation and keeps heat inside the case. You're better off investing in good fans.
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