http://www.tpr.org/post/supreme-court-rules-against-gun-straw-purchasesAbramski sale was legal. The fact he lied on the form when he bought it does not change that.
Shipley sale was also legal. The fact he lied to LEO or should have had a license does not make the sale illegal.
Hence why neither of the defendants or recipients were charged with illegally selling a firearm. Nobody engaged in an illegal sale of a firearm.
For the record, there is no law against straw purchases.