I have gotten several "dead" scanners for free, or close to it, over the years, and have bought some "dead" electronic items for pennies from friends who lack any kind of skill at diagnosing problems:
1. I got a Pro-2005 in nice shape for $20 that my friend said constantly beeped "low battery", but I put a battery in it and..worked fine. Years later, still does.
2. Went to a local electronics store with a friend who bought a bunch of their "dead shelf" items when they were closing. When we got back to his house, we were looking at some of the stuff and one of the items was a dead surround sound receiver that went for about $500 or more. I took a voltmeter and saw that there was 120 volts across the power switch. My friend said I could have it for $50, no understanding much about electricity, and I immediately gave it to him and went home. Reheating the solder on the power switch solved the problem and I used it for my home theater for many years.
3. A guy needed money to get home to LA from Vegas. He sold his brand new BC-210 scanner to a guy at work for $20! I came to work and asked him what he wanted for it and he said $40, and I gave it to him as soon as I could get to the ATM. I had it for about 15 years.
I bought a gun on an online auction for a really good price, even considering that the gun had "light rust" on it. It looked rusty in the pictures, so I bought it thinking it would just be a "shooter". It came a few days later, and I picked it up at the local gun store. It smelled oddly, but I didn't think about it. I took it home and took it apart to clean it up and I noticed the "rust" just came off. It had an odd feel to it, like toothpaste. It was some kind of polishing compound! The gun must have been loaded up with it and fired, and then put away for some time, and then sold as rusty. I kept the gun and still have it, not a spec of rust on it, and it's worth almost twice what I paid for it just a few years ago.