I'll weigh in a bit. Age is not a factor here, both are long in the tooth. Cosmetically these bikes are similar. Not a fan of floorboards. More luggage room on the 1200 Aspencade. What is the mileage on the engines? These engines go for a very long time. Mechanical issues, brakes, timing belts, bearings, and such are readily available as are most o-rings. Electrical and electronics would most likely be aftermarket, or used.
Are you mechanically inclined and a DIY person? What do you want the bike for, around town, daily driver, touring? Are you intending to keep for a while?
I have an '85 Limited Edition fuel injected model that has been my retirement work project for the past 6 1/2 years. New paint all round, and rebuilt engine, no more smoking on start. It'll be around for a while. Use it for daily rides, around town and touring.
Do the maintenance on each, carbs are a concern especially if you lay the bike up over the winter, but if not should not be an issue.
Older vintage Gold Wings can be an expensive proposition, but can be kept to a minimum as long as you keep these original.
I like the 1200 engine, works well. The look of the '82 is rather captivating.
Go for the '82. Do a lot of initial maintenance with $500.00.
get the service manuals regaradless of which bike you choose.
Good luck.