Similar thread I started last fall. https://pinside.com/pinball/forum/topic/thinking-of-buying-an-em-buyers-guide#post-1341431
Be careful, they multiply. I've bought quite a few this year.
Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside