[Colonel]

[quote="Short Hand":48330]... cost to the taxpayers of $2 million.....
# In December 2002, a preliminary audit by the Auditor General of Canada revealed that the Department of Justice was estimating the gun registry program would cost more than $1 billion by 2004-05, and collect about $140 million in fees. The Auditor General noted that this estimate did not include all financial impacts on the government
.[/quote:48330]

This was an estimate from 2002. They were right about it not including all of the costs.

As for the war in Iraq, in terms of percentage overrun, I would say that the Canadian estimate was further from the actual expenditure.