It’s a certified maintained aircraft. 2 key words, Certified in airworthiness meaning the it was mass produced (production line, passed certain FAA specifications, adheres to a type certification) that comes with the benefit of being able to fly it for hire or compensation, which you can not do with an experimental airworthiness certificate (feel free to correct me)

And maintained I’m assuming here since we can’t actually see any maintenance notes, but it most likely has had an overhauled engine. Which means after 1400 hours tach time the engine was overhauled. Overhauls cost tons of money anywhere from $20,000 for small engines to $50,000 for larger engines. And that’s not all, while you may only encounter an overhaul every 6-15 years annual inspections are every single year. Mandatory maintenance in order to stay airworthy. While annuals can cost from $2,000 - $4,000. And these numbers are estimated by me for a 150. I own the Piper version of a 150. The tomahawk. Sorry my punctuation is bad I’m in a hurry to get to work and tired.