Help me figure out the following:

• 1980 245 GL: Was this car ever produced? www.volvoworld.com says yes, www.new.volvocars.com, an official Volvo site, says no.
• Bad Spots: Common problem areas, model by model, year by year. This is useful to know when buying a used Volvo.
• Sweet Spots: What are the particularly good years / models? This is useful to know when buying a used Volvo.