A friend of my dad's gave me all his stuff back in 1997. He bought most of it in the late 1960s. It's still going strong. I have reloading manuals with $3 price tags still on them
The only thing that could really be screwed up are the sizing dies. The decapping pins could be broken or bent as well as the rod they are on. A quick visual inspection can usually tell you this. Even so, a new set of dies is about $30 so it wouldn't be the end of the world.
If you're getting old powder or primers with the equipment, you don't know what you're getting. I would buy new. I got old powder with the stuff I inheritted. It actually still was 100% fine. But I saved that for the target range and only used new for my hunting loads.