First Pinball Purchase Inspection

Hello all! I recently found out that my favorite pinball machine is on sale in my area for a good price. It has been a rough year and our tax return this year is higher than expected, so my wife suggested I go for it. I have set up an appointment to view the machine this week and would love to know of any specific things to look for. The machine is routed so I'm sure it has a high play count, but the posting did state it was in good working condition. The seller is reputable but I would appreciate any advice on signs to steer clear or potential major maintenance issues. I do not have experience in repairs but am very willing and excited to learn about regular maintenance and repairs. I just don't want to get too excited at the prospect and get something where I'd be in way over my head. I greatly appreciate any information you all may have! Thank you