It’s a Bull market.

Page Six is told that the smash hit ESPN documentary “The Last Dance” has led to a gold rush on Michael Jordan memorabilia.

Top sports auctioneer Mike Heffner told us, “The demand for everything MJ is higher than ever” since the 10-part doc — which follows the Chicago Bulls’ 1997-98 season and the rest of Jordan’s legendary career — was released in April.

Heffner said that an example of the spike in price is that some versions of Jordan’s 1986 rookie basketball card were selling for $40,000 three months ago — and now they are nearing $100,000.

“It seems like anything related to MJ has doubled or tripled in value and cards have shot up the most,” Heffner said. “More and more people are seeking to cash in on this market because there is just so much money to be made,” he said.

Heffner’s Lelands auction house is currently selling Jordan’s Nikes that he wore as part of the “Dream Team” for the 1992 Olympics in Barcelona, Spain. Jordan’s sneakers are going for around $25,000 right now, while identical shoes worn by teammates Magic Johnson and Scottie Pippen are reaching just $2,000 to $3,000 a pair. The players gave the shoes as a gift to a member of the support staff working in the locker rooms.

Also in the sale is a basketball signed by 13 players of the 16 on that historic Dream Team, including Jordan, Johnson, Pippen, Larry Bird, Charles Barkley and Patrick Ewing.