The AGRIS 10.3.0 release has added:

AGR-15724 Item Specific Prepay and Booking price to validate from Minimum and Maximum price allowed

Improve your ability to enforce your pricing policies when capturing item specific prepayments and bookings. 

This includes the ability to: 

1. Validate the minimum and maximum price at time of prepay / booking entry based on the item setup for the location in the Inventory package (Min / Max).
2.  Alert the user when the price is outside of the acceptable Min / Max range.  
3.  Use the same override price security from the Inventory package.  
4.  Assist the user in UOM conversions to ensure proper pricing is applied.

Click the linked page below for more detail on how to use this feature.

Validate Minimum and Maximum price allowed during entry (Overview)