Signed items from Phish, Pearl Jam, My Morning Jacket, Bob Weir and many others are being offered to the public in a holiday memorabilia auction from HeadCount.

Featured items include nearly a dozen event posters, including one from the inaugural Lockn’ signed by nearly ever artist who performed. There’s also a conga signed by Bob Weir and percussionist Jay Lane, who used the instrument at a private performance in 2008 that was featured in Rolling Stone. Other items include a guitar signed by the The Black Keys, a limited edition Jim Pollock print, a Grain Audio speaker signed by The Black Crowes, and multiple items autographed by Gov’t Mule guitarist Warren Haynes.

All the items can be viewed here.

The funds from this holiday auction will support HeadCount’s ongoing efforts to register voters and promote participation in democracy.

In 2012, HeadCount registered more voters than any organization in the U.S. with a budget of less than $1 million. This year, the 10-year-old non-profit ran the “Participation Row” non-profit village at Lockn’, and launched the SoundOff technology for tweeting at Congress.