Tommy Stinson has put several guitars and trademark custom-made plaid suits on the auction site charitybuzz.com.
The legendary Replacements bassist, who has a home and recording studio outside Philadelphia, is raising money for a nonprofit called Timkatec.
The organization houses and educates children in the Port-au-Prince area.
In a phone call this week during a Guns N' Roses tour stop in Belgrade, Serbia, Stinson told The Associated Press the auction is off to a great start.
More than $10,000 has been raised since the monthlong auction started Tuesday. Also being sold are VIP concert passes, trips and art by former Replacements drummer Chris Mars.