Thank you for contacting Mearto with your appraisal inquiry. Based on the photographs, this is a framed Bridgecraft stratocaster-style electric guitar with its pickguard bearing the signature of Paul McCartney. The item has an accompanying compact disc case mounted within the frame along with the guitar. This appraisal is conditional upon autograph authentication by a reputable third-party such as PSA, as the included certificate of authenticity would not be accepted as verification of authenticity in an auction setting. In determining the value of this piece, the following factors were taken into account. This model of guitar is not a professional-grade instrument and is a budget-model guitar. Also, there is no indication that the guitar was played or otherwise used by the signer - nor it is an instrument maker preferred by or endorsed by the signer. As such, assuming the autograph can be verified as authentic, Fair Market Value of the item in an auction setting would be estimated between $2,500 and $3,000 USD.