I have a few questions regarding a Vbulletin License and buying one. If you purchase a Vbulletin License from a DP user how can you be sure that it is a "real" license? What do you need to have one? Do you have to be registered at Vbulletin? Do highly modified Vbulletin's have a lot of Purchased Mods or are most mods and addons free. (For example: http://www.seomodz.com/). It is a fair bit different than the default). Does it has additional purchased mods on it?
This should help You don't have to be registered on the vb forums to buy a license. Some mods are paid, but most are free.
Yes you need the license for instalation, when you will start the instalation you will be asked for License Number : and Customer Number: otherwise you cant install the script! For more info you can take a look here: http://www.vbulletin.com/forum/forumdisplay.php?f=47