The pair join seven others targeted by pirate-hunters sniffing through Ebay's pages.
Each faces up to five years in prison, a fine of $250,000 and three years of supervised release.
Robert Koster of Arkansas admitted selling over $5 million worth of highly-priced Rockwell Automation software on the auction site. He flogged the lot for around $23,000.
Californian, Yutaka Yamamoto made around $6000 flogging Rockwell software worth $543,000.
The defendants will be sentenced in November 2007 along with four others. More here. µ