Other items being offered in the Nate D. Sanders auction of 95 pieces includes a diamond engagement ring, a 1959 Gibson guitar used to compose and record early demo tracks and outfits. We were sent the following details about the demo tape:

The 1978 cassette tape gives a unique window into Prince's early creative process, just as his career was starting to soar. One side of the tape, spanning approximately 23 minutes, features six songs by Prince, three of which are unreleased.

This piece of pop music history comes directly from Prince's collaborator and guitarist, Dez Dickerson, who says of the tape's origin: "Prince originally gave me the cassette in late 1978 because he wanted me to listen to a record he had recorded on side A (a female-fronted funk band whose name I don't remember now). Sometime during the next year or so, I used the A side to record some scratch bass and guitar parts for songs I was going to be recording for a rock/power pop demo I was doing, recording over the original content (you can still hear a snippet of the funk record at the end of the side).

On side B, Prince had his work versions of 6 songs, which I left intact for, at that time, unknown reasons (obviously, we now know it preserved a piece of musical history)." The Side B, containing Prince's songs, opens with an early, acoustic version of "So Blue", followed by two unreleased love songs with bouncy, upbeat choruses and risque lyrics. Next is an early version of "Gotta Broken Heart Again", which later appeared on Prince's seminal "Dirty Mind" album. The fourth track features heavy guitar distortion and a chorus that include very candid sexual pleas from Prince.