I was recently reminiscing about previously owned devices, all the way back to my first Android the HTC Hero. One device that stood out as a milestone in many ways was the Google Nexus One. I recell it's super fast processor, it's amazing design and it's multi coloured LED track ball. Full of excitement, I bought one on eBay!
Unfortunately, in this day and age, you can't do much with a device running Android 2.3.6, you can't install Geekbench, you can't install Dropbox... in fact, mine wouldn't even use the WiFi connection properly.
Still, I really enjoyed having a look around the device, hopefully you do too.