What exactly are your plans for the bike?

If your ultimate goal is to totally transform the bike, buy something less original. Something that has been well maintained yet has suffered some sort of crash damage. No reason to desecrate a perfect example of an xb when you can find cheaper ones out there for your purpose. But then again I’m not really sure what your intentions are or how hardcore you plan to go with the transformation.

But hell, your money, your bike, do what makes you happy.
Just keep in mind it’s A LOT of work to change the front headlight set up on an XBR.