Tupac Shakur's Ex-GF Selling His Penis Pic for $7,500 Tupac Fully Exposed By Ex Selling Junk Pic!!! EXCLUSIVE 12/6/2017 1:00 AM PT

If ya want some California love from Tupac Shakur, it's about to go on sale -- a full frontal shot of the rap legend dropping trou.

The photo was taken in the middle of a 1990 house party in Marin County. We're told Pac would frequently try to shock his pals by exposing his twig, berries and the vast surrounding shrubbery. Hey, it was a much different time.

This particular night ... we're told Pac's gf at the time threatened to snap a photo if he didn't cover up. Of course, he didn't back down, and the d**k pic was born.

We're told the ex wants to privately sell it for $7,500. A rock 'n' roll auction house is accepting offers, but if she can't get the asking price, the woman plans to let it go to the highest bidder.

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There are other party pics she's planning to sell, but Tupac's fully clothed. Save your scratch for the big show ... we ain't mad at cha.