Pick the Amazon Standard Identification Number (ASIN) of any product on Amazon in the same way you pick a color in Photoshop!
You have probably compare a multitude of ways to get ASINs on Amazon.
Did you find the asin lookup tool that gets the job done?
You found it today, pickasin
1.6.1 : Better URL support
1.5.9 : Ability to choose the delimiter at export
1.5.8 : Donate link update
1.5.5 : GP url support
1.5.4 : Minor bugs fixed
1.5 : Default options updated
1.4 : Ability to turn extension on/off via option panel
1.3 : Survey added, your opinion matters!