Are you the original owner? If so, did you keep up with the periodic maintenance as per the service or owners manual?
If you aren't the original owner, are there copies (or records) of the maintenance performed over the years? If service was performed, was it by Honda or the average Joe in his average yard? Proof of Receipts?
If you're thinking of purchasing the vehicle, does it come with a carfax report? If it was in a flood, fire, or moderate collision, I'd leave it where it sits.
At 170k, there are SOOOO many things that could go wrong if the vehicle was neglected in any way.
Ignition harness goes bad. It's under recall, but I prefer to do the work myself. $45 part at the dealer. It's the harness just off the ignition tumbler. Do yourself a favor and drain/fill the transmission at the same interval as the oil. Pulling the plug drains about 3 quarts each time. It's cheap insurance. I've been using a Valvoline high mileage fluid which is approved for Hondas with good success. Had some rough shifting from 2-1 that's gotten better over time.