Both are believed to be in Mexico and are suspected of multiple murders.
Almost 340 quarter horses or horse embryos linked to the alleged conspiracy were sold at the auction in Oklahoma City, records show.
The auction ran Thursday through Saturday at Heritage Place, a unique sale facility well-known in the horse industry.
The most expensive horse at the auction was A Dash of Sweet Heat. The winning bidder for the filly was breeder Julianna Hawn Holt, one of the owners of the San Antonio Spurs, records show. She had owned the horse previously.
Another 99 horses — all broodmares — were sold Sept. 11 to reduce crowding at the ranch in Lexington. The Internal Revenue Service collected about $32,175 in gross proceeds from the broodmares' sale, records show. Those funds also are to be kept in escrow until after the trial.
The federal government still retains possession of about 45 quarter horses, according to a U.S. Justice Department news release about the auction.
Those horses are expected to be auctioned or sold at a later date.
Held out of last week's auction were five of the more valuable horses — Tempting Dash, Mr. Piloto, Separate Fire, Dashin Follies and a colt identified only as Y516.
Prosecutors agreed to hold those horses out of any auction before trial after Jose Trevino agreed not to try to block the sale of the other horses.