Advice on possible purchase (first 4-runner!)

I’m looking at possibly buying my first 4-runner. It’s a 2004, four-wheel-drive V8 SR5 Premium sport with 312,000 miles. I have been programmed all my life to never buy a vehicle with 300,000 miles, Lol! But I know Toyota’s 4- runners routinely run into the 300s. I know I should be asking about timing chain replacements, rust, maintenance, etc. What other advice would you guys give me? Price seems good, around 4K, and I know the owner. Should be running away from this? This would be a third vehicle for my family and used mainly by my son as his daily driver for school, work, etc.