Considering Purchasing, How Many Miles is Too Many Miles?

Hey there, I’ve been looking for a decent commuter car and all around daily for myself and my dog as he’s getting older and having a hard time jumping up into my lifted Toyota FJ Cruiser.

I’m considering pulling the trigger on a 2006 with 133,000 miles. It’s a manual which I can drive so I’m not keen on it. However it’s a one owner vehicle and all of the services have been logged in Carfax so it looks pretty clean

What are some things to look out for and is 133,000 miles too much? They are asking $4k btw.