A Delta 12" Radial Arm Saw model 33-890 I had purchased new back in the 1980s sold for about $500 two years ago after listing on my local Craigslist. I included a number of blades including a dado. The machine worked fine, I just wasn't using it much anymore and it was taking up space I needed for something else. It looked pretty nice but I don't think it looked as nice as your machine. It did however cut square and stay true. The machine can be adjusted for just about any issue.
"the mechanic that would perfect his work must first sharpen his tools.” Confucius