You are rolling the dice and pretty hard . When it gives, it will cost you an engine.
TRUE
To the original poster, don't take the car to Acura dealer. The worst most awful thing about Acura is the dealerships. Most likely they will talk u out of this one and try hard to get you to buy one from them with (multi point inspection and bumper to bumper warranty and, ......)
Not really, Acura do have technicians that can address and pinpoint easily anything wrong the the MDX better than any Random joe at Sears. He only needs to pay for the Multi Point Inspection and that is it.
The oil around the oil filter could be as simple as someone did not tighten the filter well enough or did not lubricate the rubber gasket or both. I am not sure how an oil pump failure will manifest itself in the form of leaking oil around the oil filter!
Many cases of Oil Pump seals making it leak, Its been addressed many times on many forums with J Series Engines
If you like the car, have it inspect it by a reputable mechanic - most mechanics inside the service departments are not even close to be good mechanics, they just follow instructions from the company and most of their recommendations are flat put wrong or the most expensive ones or both. Your next timing belt job is about 2 years away (assuming you drive about 15K miles per year)
Let alone Sears Mechanics, And no his Timing Belt is due again because of Age, Mileage in this case has very little to do with Belt and Tensioner wear.
Assuming the car checks out, and being a basic car, you might want to negotiate the price a little down depends on what you find and what needs to be taken care off. For example, if you need a brand new set of tires and other expensive items, I would pass.