Investors & landlords

@ColeenD3 Thanks for your answer as well. So, as you stated, "If you know about when it was purchased, you may be able to look at historical gold prices." I can't prove when any of it was bought originally. So how would I make an accurate assessment to appease the IRS and do my best to avoid any headaches? Am I just making a best effort attempt to be mostly correct? Is there any way to be completely correct? The donor officially handed the items over to us a few days before his passing. So, how do I handle this?