Here is the objective truth.
The band members autographed the wrong area, and the signatures are slowly disappearing with every ball plunge.
Normally, the only way that autographs add any value is on the back glass, in an appropriate location where they can "seen but not heard". For example, I have MANY translites and backglasses signed by designers/artists, but it would apply to movie stars, rock stars, and sports athletes as well. Anywhere else, and people generally don't care, because they are not visible anyway. On the other hand, this is MUCH TOO VISIBLE.
Essentially sharpie shorthand, on a worn playfield, which is a serious negative no-no, and results in added subtraction of game value on the order of several hundred dollars. If the playfield was a freestanding wall hanger stripped to the bone, it might be worth a few extra dollars with actual verification. One this thing that has not been mentioned is certificates of authenticity. If you do not have them, the signatures must be verified, or its just a claim. Any serious buyer is going to ask this question when you put them up for sale.
Regardless, people for years have tried to tout and convince others, KISS as a great pinball machine, but only in the eyes of select fans, not discriminating pinball owners, who simply know there are many better games out there.
Best of Luck
