Like Skratch said, there are a lot of bootlegs out there, Beastiemania's has a good guide:
http://beastiemania.com/collector/bo...opsampler.phpf
I bought a copy off ebay a few years ago and unfortunately it ended up being a bootleg. I knew as soon as I pulled it out of the package and saw that it wasn't in a gatefold. It's a shame because I held a legit copy in my hands at a local record store 15 years ago and passed on it because it was too expensive. Wish I would have got it back then because this was before wide bootlegs and the price has only gone up since then.
I too have questions about this release.