My 04 MDX had to replace some valves because of misfiring. It seems that the valves were never adjusted until I owned it, too bad the damage was already done. Make sure that you can get a hold of the records to see if the valves were ever adjusted and you should be good to go. I've had zero issues since, I bought it at 88k and it now has 138k miles.
Acura recommends adjusting the valves after 105K miles (regardless of time). In your case the previous owner was not ignoring Acura's recommendation, but there may have been symptoms that he/she should have checked out but didn't.
It's always a plus if you can get a service history on the car. There is no centralized database of service for all Acura dealers; all they can pull up from Acura HQ is a history of whether it was serviced as part of any recall campaigns. But if you know the dealership where it was serviced, that dealership can give you a complete history of any work that was done there. Not only does this ensure that all the recommended scheduled maintenance was done, but it can tell you the mileage and date when it was done so you know exactly when it's due again. If you don't know this, you may be guessing or else you may want to do everything for which you're not sure it was ever done.
In my case, I bought my car from the dealership where the PO had it serviced, so I had a complete service history. I bought it with 113K on it, and it had already had the timing belt done, but no record of a valve adjustment, so I had this done soon after the purchase.
