I'm a huge Bally pinball fan of these years. Xenon & most of the speech era pins in 81 & 82 are some of the best early electronic pins. The earlier pins are also good. Bally seemed to produce on average 3 out of 4 titles, that were good to great over the years. Lots of replacement parts, & they were mass produced compared to the other manufacturers. I have owned & worked on hundreds of them. Over the last 20 years I have noticed that the value has tripled or better over the years. So the lucky people that bought before Ebay, etc. have a great, & enjoyable investment to play/enjoy.