what version?
 

My ps2 model is 39002, what version is it?
Thankx

It's a v7.

I heard that ver 5 - 8 are not as good as ver 3 and 4, is it true?

if so, what are the difference between them?

Thankx

No, its the other way around, version 5 to 8 are better than version 3 and 4 as the v.5 to 8 have a better laser fitted in them that reads dvd-r and dvd+r better, ideal for modding!