I've got one of the original gold ones with the grey logo still in the plastic case that they came in.  I can't say I recall ever seeing a grey one with a gold logo, but that was a long time ago...  I also have a red one with a white logo but those are more common.  I think I paid around 1 BTC each for them so I've just hung onto them all this time as a reminder.   

I've also got a couple Butterfly Labs FPGA miners from back in the day which I thought I'd mention for nostalgia purposes.