Quoted from teekee:I'm glad you called in the expert... cardboard does not fully block out UV rays. In the box if it was by a window with direct sunlight it could have faded some. Anyway, in this condition as is I would say its an easy $8000-$9000. I will be signing autographs at the Ohio Show and Allentown. $25.00 each... reserve your spot!
"Expert" of what? I'll bite my tongue on that one... If you read above the OP mentioned that the storage it was in had florescent lighting right above the game, for about 10 years. Hey Tony did you know florescent lighting produces UV? So yeah so much for your "power of the sun in the palm of your hand" shining down on said box theory.
To David the OP, there are still screened head decals around for purchase, that you can usually buy by themselves. I replaced them on my TZ and left the main cabinet alone. As far as devaluing the machine when swapping out original screened artwork for decals, I feel this isn't as detrimental when only done on the head.