When ordering WCS with MSE, is this all you need for WCS?
WCS-STANDARD-K9 ($0) + WCS-PLUS-500 ($44.5K)
In the past we've ordered WCS-APLOC-500. Did WCS-PLUS-500 replace it?
Is WCS-APBASE-500 for when you don't use MSE?
Yes you just need standard + Plus to integrate with MSE. Plus also gives you high availability which is a nice feature. Plus has replaced Loc.
Below link will give you all the info you need.
And Base is without MSE/WIPS/HA.