A study from the Alliance for Gray Market and Counterfeit Abatement (AGMA) and KPMG says grey market products accounted for as much as 30% of overall technology sales in 2007. AGMA and KPMG want makers to clamp down on distributors and partners. 

Vendors lost out on US$8 -10 billion as a result (but that’s before they add in all those iPhone 3Gs drifting from USA to EMEA.)

Go AGMA