Donations of noncash personal property to qualifying charities may be eligible for a tax deduction. IRS Revenue Procedure 66-49, Treasury Regulation §1.170A-16-17, IRS Publication 526 (Charitable Contributions), IRS Publication 561 (Determining the Value of Donated Property) and IRS Form 8283 (Noncash Charitable Contributions) provide guidance. See the graph below for the requirements for different Fair Market Value donation amounts. And the link below for Publication 561.
Federal Estate Tax applies to the transfer of property at death which includes all property, real and personal, tangible and intangible, wherever situated. Federal Estate Tax law fluctuates, but the methodology for determining Fair Market Value remains consistent. For guidance, refer to IRS Form 706 (United States Estate Tax Return), IRS Publication 950 (Introduction to Estate and Gift Taxes, and IRS Revenue Procedure 66-49 (Appraisal Guidelines and Formats).