@stech there should be no reason to guess at the value of ending inventory. you should have paperwork for the purchases and paperwork for the vehicle sales. if you are ever audited by the IRS this is what they'll ask for and if you don't have this paperwork they can certainly tax the revenue but disallow the cost. what do you indicate on the tax return as the method for valuing closing inventories? you are signing the return under penalties of perjury. most likely you would never be charged for this but the disallowance of costs you can't prove can result in a substantial increase in your tax bill along with the associated penalties and interest.
