To Register,or Not To Register! That Is The Question?

I've never done it...and they still took care of my legacy leather flap issue no problem. They didn't even look me up in the computer until trying to process the transaction for shipping the new bag.
 
I haven't, but I keep saying I will. Dunno. That's a lot of data entry in my case!
I won't enter the pieces I think I will sell, it's nice to have the selling point on ebay that if they buy it they can authenticate by registering online.