Back in 2009 two uncirculated Modest Mouse demo tapes turned up on eBay titled "Tube-Fruit, All Smiles And Chocolate" and "Uncle Bunny Faces'". The first tape featured only Isaac, the second all three founding members.
When asked about the tapes after a show one night, Isaac mentioned that he viewed them not as home demos, but as albums, and that very few copies existed, almost all in the hands of friends.
While "Tube-Fruit, All Smiles And Chocolate" was quickly circulated amongst the trading community, "Uncle Bunny Faces'" was not. Until this past weekend that is, when a YouTube user, MusicIsFunn, uploaded the rough tracks to his/her channel. The tracks have since been uploaded to the Night on the Sun blog. If you're a fan of early (early!) Modest Mouse, they're worth a listen, but note the audio quality is poor at best.
Source: YouTube - MusicIsFunn's Channel