Ok, I really know what they mean, but do people that sale on ebay know? I don't think they do. To me MIB means that the thing is still in unopened bags in a really nice box. And MISB, well you should know.
I bought a MISB Pogo a week ago and got it yesterday and was astounded when it was put together in a zip lock bag inside a C-6 at best box with the flag points cut out and both ends sealed with regular tape. I asked this woman before I bought it about the condition to confirm it was MISB, she confirmed it was. And the picture was on the auction was just the very front, well that looked good and going off what she told me I bought it for $15. When I emailed her to ask her WTF, she said there was no way for her to know. WTF do you mean there's no way for you to know? Well I got a full refund and she just told me to keep it. Ok, I'll keep it.
But I've seen other auctions on ebay that are listed as MIB and the thing is put together and just comes with the box. To me that's not MIB. Is it just me on this?