Q: If I specifically want Final Cut Pro 6.0.6, Which Final Cut Studio version do I purchase on ebay?

I currently have Final Cut Studio 2.0.1 on my iMac and when I installed it, Final Cut Pro 6.0.6 installed.  Cool!!

NOW!! Recently I bought a new Mac Book Pro and I was interested in putting the same software on the laptop so I could be mobile.  I purchased Final Cut Studio Academic on ebay BUT it was the WRONG AND OLDER VERSION (Final Cut Pro 6).  I want to avoid the XML transfers between devices and just purchase the correct Final Cut Studio version.

From what I understand there is FCP 6.0.5 and 6.0.6

How do I know I'm purchasing the correct version for me?  It's not specific or clear on the software.