An ad from 1957 said that Silly Putty was $1.00, the same price as today. What else hasn't changed price in that amount of time?
(This inflation calculator puts the buying power of $1.00 in 1957 as $8.41 today: http://data.bls.gov/cgi-bin/cpicalc.pl?cost1=1&year1=1957&year2=2014)
This question is in the General Section. Responses must be helpful and on-topic.