Keith- that's a nice double. The one from the Golden Gate was sold on ebay a while back.
I have 2 old Ballys myself...and I love them...BUT stating that they are easy to work on???? They're easy to maintain...but troubleshooting can be a pain if you don't understand relays, solenoids and make/break contacts. LA Slots still has EMs for sale from the El Rancho collection, and they are pricey. The good thing is once they're running well, they tend to stay in good order. Rule of thumb is you have to play them somewhat frequently to keep everything working smoothly.