According to:
http://www.1980sflashback.com/1985/Economy.asp
The USA 1985 Economy, in US Dollars:
PRICES (in USD and English Pounds, GBP at 1985 levels, divide USD by 1.3)
Cost of a new home: $100,800.00 AND £77,538
Median Household Income: $23,618.00 AND £18,168
Cost of a first-class stamp: $0.20 AND £0.15
Cost of a gallon of regular gas: $1.20 AND £0.92
Cost of a dozen eggs: $0.80 AND £0.62
Cost of a gallon of Milk: $2.26 AND £1.74