It seemed to me, that given the rate of inflation, 49 cents would have been not so cheap back then. I looked up some price on http://www.1960sflashback.com/1960/economy.asp. Perhaps the 49 cents was some kind of special because, according to that, the price in the 60s would have been 57 cents, higher than the cost of a gallon of milk, which it puts at 49 cents. Currently, in my area, milk gallon prices range from $3.49-$4.99, with an average of about $4, depending on the store, the brand, and whatever other factors come into play. That would mean that while milk prices have risen about 10x, the cost of eggs have only risen 3 to 4 times their cost then. Oh, and the cost of gallon of gas was 31 cents, so that has actually gone up more than 10x. Interesting, though, that the postage stamp then was only 4 cents, which would have made it cheaper than a local call in a payphone. A new home is said to cost $16,500.
If you jump ahead a decade to http://www.1970sflashback.com/1970/economy.asp, you find moderate increases in prices. The stamp now costs 6 cents, still less than call. The gallon of gas is 36 cents. The dozen eggs are up to 62 cents. But the gallon of milk has more than doubled in price to $1.15. The median household income is given as $8,734 (no comparable figure appeared for 1960). A house would have proved to be a good investment (as you can't hold milk for 10 years) because the new home price is $26,600.
By the time you get to 1980, home prices would have tripled over the decade to$76,499, though the median income would have only about doubled to $17,710. Other prices are as follows:
Median Household Income: $29,943.00 Cost of a first-class stamp: $0.25 Cost of a gallon of regular gas: $1.16 Cost of a dozen eggs: $1.00 Cost of a gallon of Milk: $2.78
For the rate of inflation applied to British products and prices, see http://www.thisismoney.co.uk/money/bills/article-1633409/Historic-inflation-calculator-value-money-changed-1900.html Eggs are a lot more expensive over the Atlantic than they are over here.