While I won't be able to answer that, there's probably enough variation in the amount of work required between different models that I'm suspecting the best someone will be able to do is point you to a good place to get a quote from. You're probably going to be asking for a "thorough once-over replacing all consumables & filters & inspecting all seals & bushes etc" or something like that.
What model, trim & year is it?
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