From Wikipedia:
http://en.wikipedia.org/wiki/Heritage_Auctions
In May 2009, Gary Hendershott, a dealer in Civil War memorabilia and U.S. Western historical objects, issued a civil RICO (Racketeer Influenced and Corrupt Organizations) lawsuit against Heritage for violating several Texas state laws. Amongst Hendershott’s allegations were that Heritage utilized shill bidding to increase prices, and that the Heritage failed to pay him commissions for the auction sales he had facilitated for the firm. Heritage vehemently denied the claims, terming them an elaborate ruse by Hendershott to avoid paying his bills. "Basically, it’s the plaintiff’s lawyer trying to wage a PR war to force us to the table to settle with his client, who owes us well over a million dollars.”[22]
Hendershott’s lawsuits have been dismissed, without prejudice, by three different judges, and remanded to arbitration."[23][24][25]
In early September 2009, a similar RICO complaint was filed against the firm by Chris Kortlander, a businessman from Montana who had once hired them.[26] On September 25, 2009, all of Kortlander's claims were dismissed with prejudice.[27]
On September 16, 2009 Heritage filed a motion asking for sanctions against Hendershott and his attorneys for misconduct.[28]
On September 30, 2009 Heritage filed a lawsuit against Hendershott and his attorneys alleging defamation and civil extortion.[29]
On April 7, 2010, Judge Solis of the US District Court entered a permanent injunction commanding Hendershott and anyone acting on his behalf to remove from the Internet all previously published false, misleading and/or disparaging statements regarding Heritage and enjoining them in the future to desist from making or distributing such statements.[30]
The RICO lawsuit and all claims against Heritage were also dismissed with prejudice.[31]