Tupac Shakur's last purchased ride is about to hit the auction block and is expected to go for a fortune.

Tupac's fully loaded 1996 Hummer -- which was purchased less than a month before his death -- is being hawked in a week-long online auction through RR Auction.com. ... which estimates it will go for more than $100k.

The H1 has changed hands several times since Pac's death ... it was even raffled off in a BET sweepstakes at one point. Right now a Canadian collector has it, and is obviously looking to cash in on the prized whip.