Tupac's Letter to Madonna

Madonna's infamous love letter from Tupac Shakur has been in limbo for years -- an auction wants to sell it and she wants to block it -- but it's finally hitting the block, and all the conflict and legal threats that made headlines have inflated the value, because it's expected to fetch a fortune.

Tupac penned the breakup letter when he was in prison, and the handwritten and signed note is going up for auction through the memorabilia company, Gotta Have Rock & Roll ... and the opening bid is $100,000 ... and when the gavel drops the expectation is someone's gonna snag the letter for around $300k!!!