I am looking for guidance on structuring a commission on an elevated inventory level on a potential acquisition target.

I am currently working a deal that has a large amount of inventory. Currently, I am not certain what percentage of the inventory is useful and could be sold in the first 90 days. An inventory audit will be part of the diligence process, but I need to reach an agreement before.
Has anyone used a type of commission or another structure to not pay for the initial amount of inventory and pay the sellers once I sell the inventory post-acquisition?