Add Pinball machines

It would be fairly difficult to add those. They are quite a bit different than console games in terms of physical dimensions and how eBay records their sales. There also seem to be quite a few reproduction cabinets vs originals and value can vary greatly. That would make it harder to track too.

The arcade cabinet portion of this is a separate issue:

https://pricecharting.userecho.com/en/communities/1/topics/946-add-arcade-machines-to-charting-based-off-the-exidy-price-guide