I’d say get one. Yes, they can be a bit cantankerous once in a while. But they are a joy. Make sure you get a schematic with it. And if you go for a working machine, get into it anyway. Learn how to adjust things. Learn how score reels work. Learn how relays work. Learn how the score motor works. Ask for advice on Pinside, because the EM community is the friendliest community here. They will not only help you learn, but they will teach you how to do things. They will explain sections of schematics and show you how to find your problem (hoping you learn so next time you solve it yourself). And after some time the schematic will make sense. It may take months, or it might take years, but eventually you can learn EMs. And the reward is awesome fun games.