A way to get access to steelbooks that aren't availble to be bought or shipped to your country. Someone hosts a group buy and you pay them for the steelbook + shipping and tip to get your hands on it.
It's a sub forum in the trading forum, which you won't find because you can't see/post in it until you have 30 posts.
I was posting 4-5 times a day when I first joined, so it took me about a week, and even then I didn't use the GB's immediatly. 4 months in, and I average about 4.5 posts a day
My collection is now almost 60, including some very rare steelbooks. If you'd told me that a few months ago I would have never believed you.