Up for sale is 6 pack of Dell Prototype phones. The model is "Aero" in the US, and "3i" for the international variant. 
You may notice it instead says "Benzina" and "BZ3" in some of these, I assume that is a code-names for the 3i and Aero, respectively. 

This is essentially an instant collection of a snapshot through the development process of this phone. The Benzina EPR 1.5 model (the one with the touch pad for volume) is the earliest model included. Besides the touch pad, it has a 3MP camera instead of the final 5MP, and a different battery door design. You also get various EPR versions and such from throughout the builds process

Conditions range from kind of working (booting and screen works, but some touch issues), to not working. These are not in new condition by any means

Being sold as either a collector piece, do NOT buy these to use as a daily driver phone! That is a baaad idea!

Does NOT come with a battery and some don't have battery covers.

All sales final.

Set #2