Please excuse my ignorance - I'm new here

I'm considering buying a syncro which has no diff locks fitted - I think it was a german fire bus in a previous life, and the current owner reckons that these were a very basic spec hence no diff locks.
Is this worth persuing or should I wait and buy a van with all of the bits I want?
Any other drawbacks with this type of bus? (apart from fuel economy) it has a 2.1 petrol engine.
Thanks,
Paul