Procuring Prestoos: The Committee's Greatest Successes (or Failures)

We're proud of the following Prestoos we've successfully procured, despite our best efforts to lose them in the Abydos.

• Prestoos we've managed to misplace
• Prestoos we've procured in duplicate
• The Presto that got away

And here are the Prestoos that didn't quite live up to their full potential:

• Antigravity Pants: A Prestoo that Defied Gravity (and Logic)
• Quantum Prestoos: The Ones that Were Supposed to Save Us

We're still trying to figure out what went wrong with these Prestoos. Any suggestions?