The blue color is nice looking IMO. But it was a 1979 (USA) color, only. I'd want to know more about WHY? The mfg date is on the steering head, (rider's) left side. Verify that, VERIFY the VIN # too, because when SOMETHING is wrong, many things may be wrong. If it is an '82 with '79 bodywork, was there a wreck? Are the odometer/instruments original, or also from the '79, and not true mileage? I don't remember, someone help us here, were the '79s and the '82s speedos different top speeds? Look for the vacuum fuel petcock (3 hoses, or at least 2 if the "drain hose" is missing (not a problem if it is). The fuel tap is likely not a vacuum type, as they will not easily bolt on to a '79 gas tank, if not vac type, then look for the vacuum nipple inboard on the (rider's) right side carb, angled up/in at about 45° (clever how I make that ° symbol, eh?). If the nipple is not there (whether used or plugged), the carbs are also NOT '82. The '82 will be a TI bike, if earlier, there will be a metal CDI box on top under the seat. A CDI bike would be valued less than a TI system to most folks because the TI system is much less prone to failure. The blue color is nice, as I said, but it begs many important questions on a "full retail price" bike. None of the above (except for the VIN # question) is a deal breaker, but should be reflected in the final selling price. Asking may also lead to an invitation to "GTF out of my yard!", which you should gladly do at that point. Investigate, inquire, ask, look, and poke because after you pay you may have little recourse.