@robbduss For valuation you use the FMV (fair market value.) When preparing your return, TurboTax will ask you what method you used to determine FMV, and there are 6-7 choices in a dropdown menu.
Read more about charitable donations, FMV, recordkeeping requirements, etc. in this IRS Publication 526--Charitable Contributions:
<a rel="nofollow" target="_blank" href="
https://www.irs.gov/publications/p526">https://www.irs.gov/publications/p526</a>
