I don't have much time on TZ so can't make a comparison. But the Shadow is my favorite game in my collection. I love the gameplay so many things to accomplish and I haven't seen everything yet on the game. I've had the game about 5 months now and I still play it almost every day, it has that just one more game feeling. I have to pull myself away from it in order to stop - help I'm addicted

I also love the music and artwork (except the back glass, but it's not that bad). If the one you are looking at has minor to no sanctum wear I would jump all over it - that is a rare find.

If you end up buying it and need some help let me know I did a full tear down shop job and fixed my sanctum wear.

Looks good, same fix I did with mine http://pinside.com/pinball/forum/topic/shadow-sanctum-repair

I didn't like the overlay and think if it is fixed correctly it will not hurt the value, maybe help it.

Something else to check - are the ramp diverters causing wear on the metal ramps? If so you may have to replace the armature under the playfield that holds them in place - they take a lot of abuse. It's a bit of a pain to get those aligned correctly.