Nice "smaller" Pepsi machine but that baby still weighs 350 pounds!
If the fixture, starter and ballast are still good, you should be able to get new fluorescent bulbs. They look to be about 18 inches? If the fixture is no longer working you can probably get the parts to repair it but it might be easier to wire in a small fluorescent fixture that you could pick up at Home Depot or Lowes. You could probably rig something like this to work:
http://www.soslightbulbs.com/18inchfluorescentundercabinetlightwith5-foothideawaycordset.aspxBut the picture in the reference area looks like the original had a two bulb fixture. I am sure with a little checking around a two fixture can be found at an electrical supply company as that type of fixture would be a common size for an aquarium lid.
I appears that the coin mechanism is also missing from this unit although I am sure you could find a replacement. Or you could just set it up to free-vend.
If you want the machine I would go in with $100 cash and mention the things that you are going to have to replace. Make sure it is cooling properly. If not walk away because there are a lot of Pepsi machines of this vintage out there to be had.
Tim