What's your plan for the machine, is it going to be a keeper  or a flip,
if a flip like Glen said just a cleaning  new fan motor's and T stat
to insure you don't get a phone call a week or two later from  the person                       you sold it to is now screaming in your ear about the fan or T stat not working.
  IF a keeper use it for a year or two then plan on restoring it.
  ( to make sure you still want to keep it)
 Right now the market is soft in the soda machine arena but I think 
when it gets hard again these little Sq tops are going to be the next big thing.
They work great for rec room  or man caves and if they look nice and are clean 
the wife will let them in the house  

 and they do tend to get attached
 to them 

.
 And you did great for $250 it a good looking machine .