How can I understand that this product is brand new and not used and in the box and not opened?

How can I understand that this product is brand new and not used and in the box and not opened?

Amazon:

http://www.amazon.com/Stunt-Cam-Stick-four-camera/dp/B0017HYHCM/ref=sr_1_1?ie=UTF8&qid=1251485446&sr=8-1

Ebay:

http://cgi.ebay.com/4GB-Mini-Spy-Camera-Gum-Cam-USB-Video-Recorder-MP10-NEW_W0QQitemZ110396498148QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item19b424e0e4&_trksid=p3286.c0.m14