I picked up my first UltraSabers at DragonCon as well! And it was quite the thrill!
A small back story, my friend picked up my first $75 mystery box on Friday and sent me a pic of it all opened up. I was not happy. Where was the thrill of opening my own box? So i decided to buy my own $200 box and got an Apprentice LE v4 with Obsidian. Ok cool! Monday night, before we left, she said she picked up another $75 box for me, still sealed up. We opened it together and ..... it was the Lost Grey with Emerald sound. I just about fell over.
The only downside was that it didn't come with a charger and it was too late to get one at con. So I drove back to Florida with my new prizes and into Hurricane Irma. Batteries went dead with before the storm, so I went only and ordered the charger. It came today...
My Lost Gray has come back to life!
I will definitely be getting more boxes