Nothing replaces the sound & feel of a well setup EM. The score reel spinning wildly when you make that killer shot thru a nicely tuned spinner target, the clunk-clunk of the stepper motor counting off bonus points at the end of a ball, the faint clickity click of a Gottlieb "AS" relay resetting. The chimes, the bells. And all of the mechanical stepper clunks, clicks, the buzzing of relays when starting a game. That's REAL pinball. When you see a pin in a movie or on TV, do you hear Gorgar, Taxi, or EBD? Nope- it's always chimes & bells. At least one belongs in every collection.
I see a few EM's come up on CL every so often in my area. Mostly people think they are worth big $$, but I tend to go for the non-working "projects" that are priced accordingly. Unless they are really rusty or someone has butchered the innards I will buy just about anything that's reasonable. The parts on these alone will be priceless at some point IMO.
Oregon is a hotbed of pin activity right now - you have to act fast & have cash in hand to get the deals.