Dear @chakster : The 300 series is the SAEC entry level. Now the real problem with the ceramic headshell is not its price but that's way resonant.
You don't want to mount any of your cartridges in that SAEC ceramic headshells but the series 300 came with a different build material headshells, not ceramic that's an " exclusive " to the 407/506 and 8000.
R.