I have a sales order user event script that accepts custom prices (for items that have this enabled).  The script validates the amount is correct via an encrypted signature which requires looking up the default/normal price.  My problem is that I can't look up the item without knowing what type it is (e.g. noninventoryitem) and I can't seem to find a method that would return 'noninventoryitem" using the getLineItemValue method. 

My second attempt at this used getLineItemValue to pull rateschedule which is an array whose second value is what I need (i.e. the normal price).  The problem is that this only appears to work when I run the commands in a console manually and not from my user event script.