Read below. It sounds like you have documentation from the donee as outlined below PLUS values obtained reasonably.
This, from Substantiating Charitable Contributions from the IRS:
"a written communication from the donee as a record of the contribution"
This, from Charitable Contributions from the IRS:
Donors must have a bank record or written communication from a charity for any monetary contribution before the donors can claim a charitable contribution on their federal income tax returns. ?
Donors are responsible for obtaining a written acknowledgment from a charity for any single contribution of $250 or more before the donors can claim a charitable contribution on their federal income tax returns.
