The U.S. Justice Department's 2008 report on what happened to assets it seized includes an intriguing list of items that were placed into use by various federal agencies instead of being sold off. Among them are the following assets received by the FBI: a "gambling device" valued at $2 (a deck of cards?), $120,000 in jewelry (for undercover work?), and $134 in pornography (for official jack-offs, I guess).
[Thanks to Bruce Mirken at the Marijuana Policy Project for the tip.]