I don't think its too much if your going to be selling the templates, you will make a lot more back.
The only way you will get a license is if you get it from someone else, which obviously isn't allowed
If someone does give you their license it connects to vbulletin automatically to check the license login when you install (If your online) and this will get the person you get it from in trouble, very likely that their license will be terminated.
Romanos has a good suggestion of buying one, but I don't think they allow you to transfer leased licenses now.