It's no secret, Tupac Shakur was gang-affiliated -- and a piece of his own jewelry collection confirmed it ... one that's now made its way back to the marketplace with a fat price tag. The rapper's very own gold 'M.O.B.' ring -- as it's known -- is hitting the auction block this week, courtesy of Moments in Time ... but it ain't really gonna be up for bidding, but more so ... just sold at a flat rate -- first come, first served. The going rate ... a cool $95,000 -- so you can definitely cop it if you can afford it. And hey, the value might be spot on -- considering the late icon himself wore it on a handful of ... (full story)