Give memorabilia to a celeb to increase value

This is not so much a business plan as an investment play. Rich people collect memorabilia. Celebrities are rich. Memorabilia that happens to also be owned by a celebrity is worth even more. One example is Charlie Sheen’s selling of Babe Ruth memorabilia.

My idea is to buy memorabilia, then gift it to a celebrity. In return, I would be guaranteed something like the original purchase price plus 50% of the profit. The real deal comes down to a negotiation.